A murder mystery about a landlady whose apartment block suffer after the apparent suicide of a tenant. Upon further investigation, the police lieutenant determines it was murder. But all evidence points to suicide – particularly the fact that the room was locked from the inside with the key still inside the lock from the inner part of the door. As more murders occur, all staged to look like suicides, the landlady is loosing tenants – some dying, others moving out. She is financially at her wits end.