[New Session]

The cool evening air of Paris whispered through the streets, hinting at the approach of night. In a modest neighborhood, tucked between rows of aging apartment buildings, a window on the third floor flickered with the blue light of a computer screen. It was past dinner time, and most families were winding down for the evening, but Arlene Leblanc’s night was just about to begin.

Inside her room, the walls were lined with posters of famous artworks, a testament to her passion and her ambitions. The space was tidy, with books neatly arranged on shelves and school supplies laid out for the following day. However, what stood out the most was the array of heist tools concealed cleverly in a hidden compartment beneath the floorboards.

Arlene sat at her desk, her slender fingers dancing across the keyboard as she finalized her plans for the night. The target: a rare painting set to be exhibited at a nearby gallery that boasted top-notch security. The challenge was irresistible. She reviewed the layout, the guard rotation, every minuscule detail, already dressed in her signature Swimming Robin attire.

"I'll have to be quick," she murmured to herself, her eyes flaring with excitement. "But that's half the fun, isn't it?"

She glanced at the lockpick on her desk, its metallic surface gleaming in the moonlight that now crept through her window. It was a silent reminder of her first successful heist, a memento of where it all began. With a confidence born from experience, she pocket-fitted the lockpick and pocket-clock of the clock edged closer to midnight, Arlene knew it was time to move. She gently pressed the top hat onto her head and adjusted the ribbon.

"Just another evening in Paris," she whispered with a mischievous smile. "And another game for Swimming Robin."

She brushed a white bob of hair from her face, took a deep breath, and with a glance at the Robin's Letter she would leave behind, slipped out of her room. The night, with all its secrets and possibilities, welcomed her.

The bell's familiar trill heralding the start of break resounds through the crowded halls of the high school. Students pour out of classrooms like ants from a hill, each buzzing with an energy unique to the short-lived freedom between classes. Arlene Leblanc, clad in her crisp uniform, stands by her locker, a slight smile touching her lips as her classmates chatter around her.

Her fingers dance nimbly over the combination lock, swinging the metal door open with practised ease. Inside, amidst her textbooks and neatly stacked notebooks, lies the disguise of Swimming Robin – well-hidden from prying eyes. Her gaze lingers on the hidden compartment for a moment, pondering her next thrilling escapade.

She snatches her lunch from the locker, shutting it with a soft click that's drowned in the cacophonous symphony of teenage voices. As she navigates the sea of her fellow students, Arlene blends in seamlessly, yet her mind is elsewhere, already plotting her next move in the grand chess game of her double life.

Arlene's thoughts whisper to her like an old friend, "Just a few more hours, and the sun will set. Then the city will play host to Robin's dance once again."

She finds a quiet corner in the bustling courtyard, opens her lunch, and takes a bite, but she's not really tasting it. Her blue eyes, clear and focused, are lost in the labyrinth of plans and possibilities that weave through her brilliant mind.

"Tonight," she muses, "I'll need to be smarter, faster. They're improving their security – a delightful challenge." She revelled in the anticipation, a surge of excitement setting her pulse racing. This was the life she had chosen, a delicate balance of daylight normalcy and nocturnal exhilaration. Every moment, a secret thrill.

The moon shone brightly as Arlene dart-clipped across the empty alley, her heart racing with the adrenaline of another successful heist. Clutched under her arm was her latest conquest, a beautifully intricate statuette that had been guarded like a royal treasure. Her signature outfit, the black top hat with the white ribbon, black coat, and bowtie coupled with the recognizable school swimsuit, latex leggings, and loafers made her silhouette unmistakable to any who knew of the infamous Swimming Robin.

She paused to catch her breath behind a cluster of dumpsters, ears perked for the sound of pursuit. It was after midnight, the witching hour for her kind of work, and her body was a pleasant mix of excitement and exhaustion. Her family believed her to be sound asleep in her bed, not out navigating the network of city shadows as the elusive phantom thief.

But as she turned into another alley, ready to make her way home, she skiddied to a halt. There, under the faint glow of a streetlamp ahead, stood a classmate from school, who had apparently decided that this was the perfect night for a moonlit stroll. A swell of panic rose in Arlene's chest. If recognized, her life as she knew it would be over.

There was a moment of frozen silence.

The moon was a sliver in the Parisian night sky, casting scant light across the rooftops as Arlene, known to the world as Swimming Robin, hastened across the aged tiles. Her breath came in sharp bursts, her slender form a shadow flitting against the backdrop of the city's glittering lights. Below her, the wail of police sirens punctured the silence, a relentless reminder that her meticulously crafted plan had crumbled.

Sweat clung to her forehead beneath the brim of her signature black top hat. Her heart raced, adrenaline and fear mingling in her veins. As she leapt from one building to the next, a gap wider than she'd anticipated, a monologue began in her head, her thoughts as rapid as her pace.

"This was supposed to be easy," she chided herself internally, her clear blue eyes scanning ahead for a route of escape. "A simple in-and-out, Arlene. What went wrong?"

She landed with a faint thud, her black loafers scrabbling for purchase on the uneven roof. Annoyance flickered across her cute face, grimacing in the low light. She knew her father, Officer Gustav, was likely among the sea of blue uniforms now swarming beneath her. The irony of evading her own father was not lost on her.

"Has he got closer to uncovering the truth?" The thought made her stomach twist, and not just from the exertion of her impromptu rooftop marathon.

Somewhere in the distance, a dog barked, a solitary sound amidst the chaos. Arlene's latex leggings stretched with each determined stride as she contemplated her next move. She needed a quick change of attire, a blend into the crowd, and most importantly, she needed to remove the tell-tale sign of her failed heist – the small yet incriminating Robin's Letter that peek into her coat's pocket.

"Focus," she instructed herself, her cunning mind already weaving new schemes. "You've wriggled out of tighter spots before." With the police hot on her heels and her dual life hanging in the balance, Arlene, the Swimming Robin, raced against the night, determined to outsmart the game once again.