David Druas is a successful psychologist, with a thriving practice. When he encounters Hans Werner, a client who sees imaginary doors, life takes a dark and unexpected turn.

After trying to unravel the delusion, David also notices mysterious doors. Scattered throughout the city, they lead to beautiful, terrifying and dangerous new worlds. But are they real?

When Hans Werner is murdered, the evidence identifies David as the killer. Forced to become a fugitive, he struggles to escape the deepening nightmare that threatens to overwhelm him.

As the police close in, it becomes apparent that the doors are concealing a dark and tangled truth. The question is: can David unlock their secrets before his time and sanity run out?