When Samson Brion, an undercover cop, arrives in his native village in the depths of Brittany, fifteen years after having abruptly left it, most of the inhabitants see this return in a very bad light. Notably Lila Sept-Vents, an impetuous native entrepreneur, who is trying to save her online dating agency from bankruptcy. When a series of suspicious deaths strikes this quiet village, and Lila discovers that all the victims were clients of her agency, having a cop under her roof could prove invaluable.

Three days in the lives of six friends who are nearly 30 years old, live in Grenoble, and have a rock band called the "Why Notes?". They're to play in Paris at Charles's school reunion. In ...