While searching for the perfect present for his beloved Aunt Lucy's hundredth birthday, Paddington sees a unique pop-up book in Mr. Gruber's antique shop, and embarks upon a series of odd jobs to buy it. But when the book is stolen, it's up to Paddington and the Browns to unmask the thief.

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

A young bear ends up in London2s Paddington Station, where he is spotted sitting on an old leather suitcase outside the lost and found by a family called the Browns. Unable to resist the label around his neck that reads Please Look After This Bear. Thank You, 2 the Browns decide there is only one thing to do. They take the tired, hungry little bear home and adopt him, not as a toy or a pet, but as a child.