With no one else to watch them while he attends a job interview, Donald Duck begrudgingly leaves his nephews Huey, Dewey and Louie with his uncle Scrooge McDuck. With his adventurer's spirit rekindled, Scrooge decides to take them all on a mission to find the Lost Jewel of Atlantis. After this successful adventure Beakley and Donald allow the children to accompany Scrooge on further expeditions. Scrooge offers to let them all move into McDuck Manor. In the aftermath, Dewey discovers a painting of their mother adventuring alongside Scrooge and Donald.