A talking chimp, a jolly monk and a boxer on the run make an unlikely team in this French comedy for children. Brother Benoit, a French monk working with underprivileged youth in Mexico, one day finds a sick chimpanzee in need of water and medical attention. He brings the chimp back to his mission and nurses her back to health, naming her Mookie. A year later, Brother Benoit discovers Mookie can not only play basketball, but she can talk, the result of an exposure to radiation from a meteor crash. Primate experts from America are eager to get their hands on the little ape, but the Brother will allow no experiments to be performed on her. The Brother recruits Antoine, a boxer down on his luck, to help Mookie and the Brother flee to Mexico City, but when it turns out Antoine is wanted by the Mexican Mafia for not throwing a fight, all three must make tracks to insure their safety.

Sebastian, a renowned orchestra conductor, loses his son in a motorcycle accident for which his wife blames him, leading to the family's disintegration. With the intention to recover his daughter's affection, he takes her to Guanajuato, where he has a presentation. However, the unexpected encounter with a mortally wounded old man, who asks him for help to fulfill his last wish, will involve them in that mysterious murder, starting at that point a battle against their conscience and their own survival... a dangerous race against the clock. A touching story of drama and action, which shows us how a common family can be, when they less expect it, the main players in a surprising and dangerous adventure, for in life anything can change... when things happen.