Ricardo, a second year high school student, is teased, persecuted and assaulted by several classmates. It is a case of mistreatment with abuse of power that provokes in the boy a defeatist thought system, of devaluation of himself and helplessness that soaks his emotional life with sadness and anger. Through dialogue with his family and friends, Ricaro will become aware that these thoughts are like piranhas that devour his self-esteem and emotional well-being. He will learn to deal with them, deactivating his destructive power, until he improves his personal abilities and changes the situation. His cousin Rosi, three years older than him, advised by his mother, will train Ricardo in various stress coping strategies: cognitive restructuring, relaxation, imaginative visualization and self-exposure to stimuli. The use of these procedures of modern rational emotional psychotherapy will allow our protagonist to maintain a firm emotional position, neither submissive nor aggressive, from which to assert his rights, express his complaints and seek help. By modifying certain maladaptive beliefs he will achieve a constructive approach to the situation. Following Ricardo's path, any reader can learn a strategy to turn his negative emotions into energy that protects him and drives him to effective action. On the other hand, Nicolás, a friend of Ricardo, will carry out a plan that will mobilize the students of the school and change the passive attitude of the witnesses of the harassment. The management team of the school will propose the defense to the victims and will suggest an educational action to carry out with the aggressors. All this, together with the Congress of Communication and Friendship that the protagonists organize, constitutes a suggestive program of intervention in the face of abuse in the school environment.