An adventure for anyone who's ever worn diapers.

The Pickles family welcome a new arrival, Dil, whose constant crying and need for attention quickly exhaust the other toddlers. Seeking to return the "broken" baby to the hospital, the gang embarks on a journey in a Reptar Wagon that inadvertently veers off course, leaving them stranded in a vast, dangerous forest. While facing off against escaped circus monkeys and a predatory wolf, Tommy must overcome his own resentment to protect his brother and make it back home.