One evening, during a party held in their apartment, Jacques, a professional steward, agrees to act as a courier for a package that a friend will deliver to him the next day.

Reluctantly, the two friends, unaccustomed to the responsibilities of parenthood, find themselves overwhelmed by the demands of caring for an infant—feeding, changing diapers, and enduring sleepless nights.

Initially relieved, they hand over the cradle, only to realize moments later that the actual "package" awaited by the men was delivered by the caretaker days earlier, containing illicit drugs.

However, the child's mother eventually brings her back to the roommates, marking the beginning of a new chapter in the lives of the three men as they adapt to caring for the baby.

[7] The American adaptation itself was imitated by two Filipino films: Wake Up Little Susie (1988) and Rock-a-Bye Baby (1988), and was subsequently adapted into several Indian films, including Baalache Baap Brahmachaari (1989) in Marathi, Thoovalsparsham (1990) in Malayalam which was then remade as Chinnari Muddula Papa (1990) in Telugu, Thayamma (1991) and Asathal (2001) in Tamil, Heyy Babyy (2007) in Bollywood and Tatlı Bela (2018) in Turkish.