With this breathtaking Agatha Christie mystery, the 3rd Girl writing a London flat with two others announces to Hercule Poirot that she’s a murderer and disappears. The masterful investigator must figure out whether the lacking girl is normally a criminal, a sufferer, or merely crazy.

Three young women share a London flat. The foremost is a coolly efficient secretary. The second reason is an artist. The 3rd interrupts Hercule Poirot’s breakfast confessing that she is a murderer-and after that promptly disappears.

Slowly, Poirot learns of the rumors surrounding the mysterious third girl, her family members, and her disappearance. However hard evidence is needed before the great detective can pronounce her guilty, innocent, or crazy….