In Ang Mo Kio stood the infamous block 645 of HDB rental flats. With 352 units of 2-room flats and long, dimly lit corridors that seemed to stretch endlessly, the building often cloaked itself in an eerie silence after dusk.

One such evening, a diligent student named Li Wei was burning the midnight oil, preparing for her O-Level examinations. Her room, nestled at the far end of one of these corridors, offered a quiet sanctuary from the outside world. But tonight, an inexplicable sense of unease hung in the air.

As Li Wei focused on her textbooks, a cold shiver ran down her spine. She couldn't shake the feeling that someone, or something, was watching her through the louvre window panels of the corridor. Initially dismissing it as paranoia, she tried to concentrate on her studies. But the sensation grew stronger, an almost tangible presence pressing in on her.

Summoning her courage, Li Wei decided to investigate. She crept towards the window, her heart pounding in her chest. Through the glass, she saw the reflection of a girl wearing a hairband and a white T-shirt. Relief washed over her as she laughed at herself for being so jumpy. Clearly, it was just her own reflection.

Returning to her desk, Li Wei tried to shake off the lingering discomfort. Her eyes drifted to her own reflection in a nearby mirror. Her breath caught in her throat, and her blood ran cold. She was not wearing a hairband. Nor was she dressed in white. Instead, she wore a blue T-shirt.

In that moment, the reflection she had seen through the window was not her own. The realisation hit her like a freight train—she had been looking at someone, or something else entirely. Alone in the stillness of the night, the echo of her earlier laughter seemed to mock her, amplifying the silence that now felt oppressive and heavy.

And so, the mystery of the corridors of block 645 deepened, with Li Wei forever haunted by the memory of the girl in the white T-shirt and hairband who watched her from the shadows.