Young Carla approaches M. Poirot for his help in investigating a murder committed 16 years ago. Her mother was accused and then convicted for killing her husband, Carla's father, Amyas Crale. Crale was a famous painter and womanizer. He was known for his artistic temperament and promiscuous ways. He had several lovers in the past but used to always return to his wife. Things were different now, Elsa, his latest muse is a sublime young beauty. The middle aged Amyas has fallen for her and now wants to marry her despite him being married and having a little daughter.Middle aged men often fall prey to their carnal desires but this man has gone too far he is keeping his muse and his wife under the same roof. The result is that foolish painter is found poisoned. His wife is accused of murder, the evidence and the battery of witnesses against her is too strong. She is convicted and dies in prison. Carla, her only daughter believes that her mother was innocent and that now she wants closure for herself and her mother. Poirot now has to investigate a murder committed 16 years ago.
Dr Sanders, a forensic working on a poisoning case is walking back to his home after a long day at the office. In the middle of the night he is asked for help by a beautiful young woman who asks him to accompany her to a a certain Mr Felix Haye's flat. On reaching there he is shocked too find a gathering of 4 people who look like dummies, all of them have been heavily drugged and Mr. Haye is found murdered.