After closing his agency Alibi.com and promising Flo that he would never lie to her again, Greg's new life became quiet, too quiet... Not for long! When he decides to propose to Flo, Greg is up against the wall and has to introduce his family. But with his crooked father and his ex-charm actress mother, this could ruin his future union. He has no choice but to reopen his agency with his former accomplices for an ultimate Alibi and to find more presentable fake parents.

An FSB officer falls in love with his agent, an American woman, who works as a trader in a Russian bank.

Looking for a babysitter for the night, Marc Schaudel entrusts his son Remy to the care of his employee Franck, a straight man. But Marc doesn't know is that Franck is turning 30 years old this weekend and that Remy is a very capricious child. The next day, Marc and his wife Claire are awakened by a call from the police: Remy and Franck are missing, and the house is totally destroyed. The police find a camera in the leftovers. Marc, Claire, and the police start watching the video that was recorded the night before and find out what happened to Franck and Remy.