Paris, France, April 2020. Félix, manager of a luxury hotel, decides to start a clandestine business during the first lockdown caused by the COVID-19 pandemic.

A novelist attends the trial of a woman accused of killing her 15-month-old daughter by abandoning her to the rising tide on a beach in northern France. But as the trial continues, her own family history, doubts, and fears about motherhood are steadily dislodged as the life story of the accused is gradually revealed.

Inspired by the adventures of Arsène Lupin, gentleman thief Assane Diop sets out to avenge his father for an injustice inflicted by a wealthy family.