Lady Enkkeitl invites Dr. Christou and his wife Gerda to a weekend at her country estate, Lošchina. In their family everything is far from smooth: the doctor has an affair with the sculptor Henrietta, and now his first love, the actress Veronica Cray, unexpectedly appears. Hercule Poirot lives in a neighboring cottage and has been invited to lunch at the estate, where he witnesses a crime.