There's a Scavenger Hunt going on in Angel Grove. The Ranger teens split up into two groups (Adam, Kimberly & Tommy in one team, and Aisha, Billy & Rocky in the other). They scour the city searching for items that are the answers to various riddle-clues. One of which is a toy cannon that once belonged to Billy's little cousin. Zedd turns it into the Cannontop Monster, and plans to have the creature blast the Rangers into the Lost Dimension. Our heroes stop Cannontop, and still manage to win the Scavenger Hunt, with a little biased help by Ernie.