Numbuh 1 rants on about the Delightful's birthday and how Sector V is going to steal the DCFDTL's cake. But after revealing that the birthday is tomorrow, the rest of the team refuses in going along on this mission because tomorrow is Toobathon, a summer tubing race. Numbuh 1 tries to convince the others, but fails in doing so. The others mock Numbuh 2's old tube, a tube named Betsy. Betsy always comes in last place. Suddenly, a missile crashes, and the group discovers the DCFDTL talking to them in a hologram. The Delightfuls are saying that the only way to get the cake is to win Toobathon.