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.