Zavry zabolevayut strashnoy boleznyu - ushnym homyakom, ili sindromom navyazchivoy melodii. I zarazhayut ves gorod! Riki sozdayot svoyo ohrannoe agentstvo, chtoby spasti klubniku mamy Diny ot naglyh pterodaktiley. I hochet poskoree lishitsya pervogo molochnogo zuba, chtoby k nemu prishla dinofeya. A eschyo deti snimayut novost dnya pro shlyapnoe derevo i razgadyvayut zagadku pohischennyh shlyap.