Five American teen couples arrive at an Idaho cul-de-sac to participate in an experiment asking them to see what kind of parents they would make, whether they could handle adult responsibilities and to test their relationships by looking after other people's babies and children. The couples continue to care for their borrowed babies and many start to feel the strain. Adding to the stress of being first-time parents, one person in each couple must work to support the household while the other stays home alone to care for the baby. After long days and nights of work and childcare, the tired couples are surprised when one of their own parents arrives for a short visit. But some couples are not as happy as others to have a visitor.