Twelve-year-old Capi suffers a terrible accident that leaves him with severe PTSD and the power of invisibility. No one knows what happended, but the psychologist who treats him is determined to discover what led him to this situation.

Kiri is upset by Capi's accident and finds herself unable to go to the hospital to see him. At the psychologist's office, Capi recalls the start of his problems at school: after a biology exam, MM and his friends began to make his life impossible.

Capi tells the psychologist that he got the power to become invisible when he went to MM's party. Zaro and Kiri accompanied him and Capi ended up having an accident with unexpected consequences.

Zaro has always been Capi's best friend, but due to peer pressure, he starts to hang out with MM and his friends. Ever since the accident, Zaro has been unable to visit Capi, even though he is out of the hospital.

MM becomes increasingly isolated due to guilt and the investigation launched by the school to try to shed light on the accident. Capi opens up about the ongoing bullying at school and how the only supportive person was a teacher.

Capi tells the psychologist the truth about his accident, finally facing reality. The teacher unveils the mystery of the dragon on her back that conceals a painful story. Following the investigation, the principal decides to have an assembly.