Felicity, Miguel, Yana, and Athena get coupons for free cupcakes. To get them, they must cross through the Phobia Forest, where they must avoid getting new phobias via wasting their appetites; Rudy wants to use the coupons to himself.
Miguel invites a chipmunk to his and Felicity's friend-iversary. But the "chipmunk" isn't actually a chipmunk - it's actually a ferocious monster threatening to wreak havoc in Mythlandia.