In this comedy-drama, a young but sterile man suddenly wants to be a father. A friend calls this the "kangaroo complex," because male kangaroos do not have pouches to carry their offspring. So Loic (Roland Giraud, just out of his starring role in Trois Hommes et une Couffin later to be remade in the U.S. as Three Men and a Baby), goes looking for a solution to his "complex." He cannot have children himself because of a bad case of the mumps when he was in his mid-20s. That does not leave many options open to him until he accidentally comes across his old girlfriend with her 6-year-old son and notes that the little boy looks a lot like him. It does not take much to convince him that the boy is his own but once having reached that conclusion, the rest of his plan for new-found fatherhood is loaded with pitfalls.