Saturday and Sunday are a pair of lizards living the good life, lazing around on a tropical atoll and fishing off the beach. But when Saturday comes down with a case of acute questionitis, the big mysteries—why are we here? how did we get here?—won't leave him alone. Only travel can cure his ills, and he sets off with Sunday in tow. What's a best friend to do but tag along? Together, the indefatigable duo have encounters both fanciful and philosophical in this charming and freewheeling paean to simple joys, curiosity, and friendship, fit for all ages.

Saturday and Sunday are still lounging about when they are summoned to a grand debate. The island's populace is being threatened by an invisible monster and no one agrees about how to best deal with the disaster. Rallying around Sunday's opinion, which consists in the idea that "living outside is pretty cool," the young inhabitants leave their underground lairs and discover freedom. Meaning that they create major chaos and gorge themselves on suspicious-looking mushrooms. In the meantime, Saturday falls head over heels for a woman in a red dress. It's all very funny and tender -- no debate about that.