The bourgeois and extremely eccentric Van Peteghem family—among them Juliette Binoche, Fabrice Luchini, and Valeria Bruni Tedeschi—have settled in for another summer at their cliff-top villa overlooking the picturesque Slack Bay. Their leisurely rhythm of sunbathing and seaside constitutionals is soon interrupted by the arrival of two bumbling inspectors (à la Keystone Kops) investigating a string of tourists gone missing.