When their trip to San Lorenzo takes a turn for the worst, Arnold and his classmate’s only hope of getting home is retracing the dangerous path that led to Arnold's parents' disappearance.

The daily life of Arnold--a fourth-grader with a wild imagination, street smarts and a head shaped like a football.

The school year is finally ending, and T.J. Detweiler is looking forward to summer. But boredom quickly sets in when his friends leave for camp — until T.J. uncovers an evil plot to do away with summer vacation! A crazy former principal, Dr. Benedict, is planning to use a laser beam to alter the weather and create permanent winter. Faced with the dire threat of year-round school, T.J. rounds up the RECESS gang and bands together with some unexpected allies — Miss Finster and Principal Prickly — in a nonstop adventure to save everyone's summer break. As the kids discover the heroes inside themselves, a platoon of wacky characters, far-out music, and sci-fi surprises turn this madcap mission into a major victory for fun!