The Harvey Girls are getting a special surprise--- the arrival of the iconicly wonderful Richie Rich! Then, things go rough at a game-gone rogue when joy is being collected. Lessons taught during a murder mystery party bring Richie to a close relationship of friends.

Audrey takes a bite out of what more she can chew when she and her friends grab international ice creams like Harvey Boulevard's cotton candy cones, Italian gelato and Japanese Momo Mochi pops. A fishy jingle brings in an earworm which turns the kids into "songies".

Lotta takes a personality quiz and learns she's supposed to be evil. Tiny and Lucretia offer to get the girls' costumes for the Horn-A-Corn convention.

Audrey, Dot, Lotta, Richie, Lucretia and Tiny arrive at Horn-A-Con and decide to divide and conquer, breaking into three groups for maximum adventure.

Richie assembles a team to turn Stu into a social media celebrity. Richie has a sheltered talking dog named Dollar, who doesn't get much of being adorable. Suddenly, when he gets scared by lots of fireworks, he makes new animal friends.