In Paris, Vincent Larchet and Mathias Warkhevytch have been best friends since childhood. They share a rented apartment belonging to Vincent's father, who is an important anesthetist of a hospital in Paris, and with whom Vincent does not have a good relationship. Vincent does not work or study, having left Law School after being dumped by his girlfriend Alessia Massari. He is a selfish liar, cheater, lazy and disloyal man that likes to criticize others to protect himself. However, he is worshiped by Mathias, who misses his former girlfriend, Natacha, and is working on a never ending thesis. On Matthias' birthday, Vincent breaks into his father's apartment to celebrate with his friends, but his father unexpectedly returns from a trip and finds a complete mess. He challenges Vincent and Matthias to survive in the streets of Paris for seven days and seven nights with seven Euros. They accept the bet and along the period, Vincent learns the value of the unconditional friendship and loyalty.