The newly married Elizabeth arrives with her new husband, the scientist Henry, at a magnificent house. He tells her that she can do there anything she pleases, except to enter a certain closed room.
When several women are found mutilated and murdered, the Paris police are baffled as to who the killer may be. All evidence points to Dupin, but soon it becomes apparent that it is someone (or something) stronger and deadlier than a human.
Erika Toda joins a law firm headed by Serizawa-san, on the first case she meets Enomoto Kei of Tokyo total security who unlocks Serizawa who has accidentally been trapped in a vault. Form thereon the trio solve 10 cases related to the locked room. Enomoto always makes a small scale model and thinks technically in terms of security and locks to solve cases, while Serizawa assists by hinting some circumstantial evidences. Serizawa is always ready to take credit of new found fame.
In the near future, police detective Richard Manning is investigating the most difficult case of his career – the seemingly impossible locked room murder of a wealthy property investor. The more Richard investigates, the more complex the case seems to become. He soon realizes his own future and survival depend on him solving everything – and quickly.
TV journalist Tab Holland assists Scotland yard with the murder of a reclusive millionaire whose corpse is discovered locked in a vault. The key to the vault is mysteriously found on the table beside the corpse.
Eight year old Federico lives with his father in a meagre apartment in Mexico City. His father devotes his days to sleep and work, keeping young Federico away from a carefully-guarded, locked door, behind which lies his mother.
Stuck in a room with two hit-men, three students must keep their wits about them in order to survive the night.