Finn and Jake must go on a quest to find the Lich King (originally sealed away by Billy), while the Ice King pesters them for permission to date Princess Bubblegum.
Finn is excited to discover what appears to be a tribe of humans living underground near the Candy Kingdom, but gets more than he expected when he tries to teach…
Finn has to give a speech at Princess Bubblegum’s science barbecue and seeks a quick fix to make himself smarter.
Whilst the Ice King goes out to take Gunther to the hospital, Finn and Jake decide to sneak inside his lair and flex their ninja skills.
Finn is captured by gnomes who want to use his energy to power their infernal machines, and it’s up to Jake to stay focused and rescue him.
