One Late Night is a short immersive horror-game experience, starring an unnamed graphic designer employee, working late one night at the office, until strange things start to happen.

The basic idea is that players who have been in similar situations, and worked with similar office jobs, will relate themselves to the game setting and scenario and become immersed. Even if you can't relate to the game storyline, you will still get a good experience. The storyline is presented with short monolouges, displayinf the thoughts of the player, as you need to perform certaion task to proceed in the game to continue discover new clues about what's going on.

Disini agan di ceritakan sebagai seorang Graphic Desainer di sebuah perusahaan yang bernama WEBCOM. Alur ceritanya disini pada saat agan sedang kerja lembur sendirian mulai lah bermunculan hal-hal aneh di dalam kantor tersebut. Dan ternyata hal tersebut juga yang membuat teman se-kantor agan yang bernama Robert gak pernah masuk kerja lagi.

Tapi tidak sampai disitu saja. Ternyata di dalam kantor tersbut ada sesosok Mahluk yang menteror siapa pun di sana pada malam hari.