Byeonsinjadongcha Tobot 4th Season

After repeatedly saving Daedo from villains, the Tobots are celebrated as the city's protectors, and Duri begins acting as though their victories make him a hero too. His boasting hurts computer prodigy O-gong, who built a fake Tobot model to encourage his seriously ill younger brother, Ondal. When Duri exposes the model as a fake, the shock leaves Ondal bedridden and O-gong furious.

Diluk takes advantage of that anger and recruits O-gong into a plan against the Tobots. A virus makes the robots behave dangerously, while a fake Titan is used to frame them and destroy the public's trust. But seeing that Ondal still believes in the Tobots forces O-gong to reconsider his revenge, and the crisis pushes X, Y, and Z toward a new three-way combination strong enough to confront Diluk's scheme.