In an isolated mansion in 1950s France, a group of eight women gathers to celebrate Christmas, but the festivities are interrupted by a dark secret: the patriarch of the family, Marcel, is found dead under strange circumstances. With a storm battering the house and no possibility of escape, the women must deal with the tension that arises among them as they try to uncover the truth behind the mysterious death.
The matriarch, a strong and authoritative woman, leads the investigation, gradually revealing the complex relationships and resentments that exist among the attendees. From the young mistress who sees this as her only chance to start a new life, to the wife who has been ignored for years, each woman has a motive for wanting things to remain secret. As tensions escalate and accusations fly, family dynamics and past secrets begin to come to light.
With a vibrant and colorful approach reminiscent of theater, the film plays with the genres of mystery and musical comedy, filled with witty dialogues and musical numbers that highlight the emotional depth of each character. In this game of who is who and what is what, the songs resonate not only as a means of expression but as biting critiques of women's lives and their struggle for power in a male-dominated world, all while trying to solve the puzzling mystery that surrounds them.