Paddington travels to Peru to visit his beloved Aunt Lucy, who now resides at the Home for Retired Bears. With the Brown Family in tow, a thrilling adventure ensues when a mystery plunges them into an unexpected journey through the Amazon rainforest and up to the mountain peaks of Peru.

A young Peruvian bear travels to London in search of a new home. Finding himself lost and alone at Paddington Station, he meets the kindly Brown family.