Stéphane decides to move to the beautiful mountains of Cantal in order to reconnect with his 8-year-old daughter, Victoria, who has been silent since her mother's disappearance. During a walk in the forest, a shepherd gives Victoria a puppy named "Mystery" who will gradually give her a taste for life. But very quickly, Stéphane discovers that the animal is in reality a wolf… Despite the warnings and the danger of this situation, he cannot bring himself to separate his daughter from this seemingly harmless ball of hair.
While diving in a remote French lake, a couple of YouTubers who specialise in underwater exploration videos discover a house submerged in the deep waters. What was initially a unique finding soon turns into a nightmare when they discover that the house was the scene of atrocious crimes. Trapped, with their oxygen reserves falling dangerously, they realise the worst is yet to come: they are not alone in the house.
The biting banter of ex-husband and wife, Richard and Kate, suggests that the flames of their former relationship have not been fully extinguished...Unfortunately the same cannot be said for their retirement nest egg which is wiped out when Richard's investment firm is defrauded and the pension fund is siphoned away. Learning that the unscrupulous French financier behind the scheme has just purchased a $10 million diamond for his bride to be, the divorced duo grudgingly agree to set aside their differences, and hatch a plot to gate-crash the wedding and steal the rock. Roped in to assist in the heist are the couple's former neighbors who are also rooting for their reconciliation. The foursome form an unlikely band of lawbreakers in this classic comedy caper set against the sun drenched backdrop of the Cote d'Azur.