In Victorian London, a disillusioned detective and a mysterious figure with knowledge of time-travel uncover a hidden portal to a parallel world, where they must solve a series of disappearances and prevent a catastrophic event that they soon realize is caused by their own actions, leading to a difficult decision to sacrifice their knowledge of time-travel to save their own timeline.
Protagonist: A disillusioned detective investigating a series of mysterious disappearances; Deuteragonist: A mysterious figure with knowledge of time-travel who aids the detective in uncovering the truth behind the strange occurrences in Victorian London.
The detective and the mysterious figure uncover a hidden time-traveling portal in an abandoned building, leading them to a parallel Victorian London where they must solve the disappearances and prevent a catastrophic event.
As the detective and the mysterious figure unravel the truth behind the disappearances, they realize that the catastrophic event they must prevent is their own future. They make the difficult decision to sacrifice their knowledge of time-travel to close the portal and prevent the disaster, ultimately saving Victorian London and their own timeline.
Twist: The detective and the mysterious figure discover that the catastrophic event they must prevent is actually caused by their own actions in the parallel Victorian London, forcing them to confront their own choices and the consequences of meddling with time-travel.