Adventure Time Finn x FP and their kids :)

After Felix and Felony (Finn and Flame Princess's children that just happen to be twins) turn 14, they are forced to learn about the history of their parents when they were their age when their younger sister disappears. The twins can't stand losing anybody else, like how their parents disappeared eleven years ago. With the help of Uncle Jake, can they learn the history of Ooo in enough time to save their parents?