After tragedy strikes Henry and Penny, he befriends a tenacious young girl and discovers she is constructing a raft to sail across the Atlantic to find her lost father. Together, along with some unlikely friends, they set forth to construct the vessel and subsequently rebuild their lives.
Jimmy lives in the tranquil town of Eagle Rock, Louisiana, with his father, stepmother and his best friend Rainy, a German Shepherd. When Jimmy's father gets a promotion, the family must relocate to an apartment in New York City that has a strict no pet policy. Unwilling to let his master go without a fight, Rainy embarks on a cross-country journey to New York but navigating the Big Apple is just the beginning of his challenging adventure.