All aboard! It's a birthday train adventure for Finn and Jake with murder, mayhem, and cake! As all good mysteries have. Back in the studio the pitiful humans have more dull semi-plot related conversations, all the while that they have been the victims of a takeover and that now it is the Royal Velvet Queen Pig who controls the studio now; with her commanding voice she issues her first commands to be heard by her service subjects. Will the respect the new world Pig order, or will Velvet have to make an example of them?