Following the release of the Vampire King's Vampuric essence, Finn, Jake, and Princess Bubblegum are forced into a fight against the seemingly unstoppable force without the aid of a depressed Marceline.
A King's Ransom: Ice King suffers a heartbreaking loss and it's up to Finn and Jake to find the culprit. / Scamps: Finn takes a group of at-risk Candy Kingdom youth on a camping trip they'll never forget.
Flute Spell: Jake learns that Finn's been having clandestine meetings with a powerful wizard. But what are they up to? / The Thin Yellow Line: Finn and Jake infiltrate the Banana Guard ranks and stumble upon a conspiracy.
At the library, Finn learns of a mountain with treasure possessing transformative properties at its peak. He and Jake venture to find the treasure, but find more than they expected when they encounter the hermit guarding the treasure.
Beyond the Grotto: In pursuit of a runaway Sea Lard, Finn and Jake are led down a whirlpool to a curious new land. / Lady Rainicorn of the Crystal Dimension: Jake's son TV finds a hidden box and draws the attention of a super cool Rainicorn named Lee.
Normal Man: Stripped of his magic powers, Normal Man enlists Finn and Jake's help to rescue his brother Glob. / Elemental: Ice King discovers something buried deep beneath the Ice Kingdom that could change Ooo forever.
The Music Hole: While judging the hugest Battle of the Bands in the history of Ooo, Finn hears a mysterious new song. / Daddy-Daughter Card Wars: To put his embarrassing past behind him, Jake needs his daughter Charlie's help to win an underground Card Wars tourney.