When an infant named Mary is left on their doorstep, three bachelor roommates (Tom Selleck, Steve Guttenberg and Ted Danson) channel their feminine side and become surrogate parents to the tyke. After a few false starts, the guys eventually take to their little bundle of joy. But questions linger about the baby's real origins, and why drug dealers are taking an interest in their life. Leonard Nimoy returns to Earth to direct this hit family comedy.