Finn and Jake are invited to Princess Bubblegum's yearly party, when a new entry, Finnette The Human arrives.
The screen opens with Jake, Finnn, LSP and Princess Bubblegum all dancing, with others in the background. PB says that she is delighted that Finn could make it and that she has a suprise. When Finn turns around PB presses a button on her watch she is wearing and a door opens. A girl with brown hair that looks like Finn and a cat that looks like Jake walks in. Finn is suprised the girl looks like her. At the same time, they both say I'm Finn/Finett the Human.