Roger, Anita and their canine clan are making preparations for the big move to Dalmatian Plantation, a country home with ample room for the 101 pups and far from the clutches of Cruella DeVil. Dalmatian pup Patch desires to have an identity of his own outside the pack, aspiring to become a one-of-a-kind wonderdog like his TV hero, Thunderbolt. While watching his favorite program Thunderbolt Adventure Hour, Patch learns about a chance to appear on the show while it is filming in London. However, the family move conflicts with this opporunity, at least until, Patch is accidentally left behind. Finding himself alone, Patch heads to the audition. Meanwhile, Thunderbolt's sidekick, Lightning, reveals that their producers want to replace Thunderbolt with a younger dog. To preserve his job, Thunderbolt decides to perform true acts of heroism in the real world. And Patch helps out being by being a veritable reference book to Thunderbolt's many adventures, and in turn, a guide for the TV star's real life heroics.