It all begins at the Porter's Café where an event is taking place about recycling. Rocky shows Hailey his project and passed to Harold since he is not yet finished. As Harold lamented the Copycat goes near him and gives him powers and Harold builds his mini robot. Copycat commended him a little and decides to help him and they made into a tiny robot army. Causing the robots to wreck havoc at the competition. Rocky reported the scene to Ryder, Marshall and Rubble. Who are on their way. Rubble and Marshall charged up and they rushed to the rescue.
At the City Hall Mayor Goodway is barricading herself. Hailey Daily is reporting on who will defend them. Just as then the Mighty pups arrived in time. Harold commands them out of their way. But Marshall launched a fire blast but the Copycat responds by using an energy net shield to absorb the attack. Rocky noticed he used his power and Copycat mocked him and the PAW Patrol. Ryder begins to disable the tiny robots but Harold crafts a Hoverboard to go after Ryder. The tiny robots gathered on Marshall. Ryder and Harold are on an air battle until Marshall leaps to Harold and burns his hoverboard causing him to crash land and banged on by Rocky's project. Ryder then ordered Rubble to use his wrecking ball to stop the tiny robots and Rubble succeeded using his wrecking ball ability. Mayor Goodway heads outside and Copycat escaped the scene, and turns back to his alter-ego.
Mayor Goodway awarded Rocky for winning the meet. And Harold is forced to watch as his teeny robots cleans some mess.