Comic Sal Howard has a giant drawback: his spouse, scientist Dr. Dana Howard, doesn’t need children. To avoid wasting his marriage, Sal tips Dana into pondering he’s change into an actual child to indicate Dana the thrill of motherhood. Sal’s harebrained scheme works. However the plan backfires when Dana develops a hormonal serum that may rework Sal right into a full-time, grownup child– ceaselessly! Manbaby is an absurd, comedian fairy story about what it means to develop up.