Mark's life changed dramatically when his uncle Jake, a tough commando and marine, came to visit him and his mother last summer. He helped Mark go a long way from a weakling to a real warrior in just one summer! And it was not at all as easy as it might seem. Uncle Jake helped his nephew overcome fears, become strong and work on himself every day, because discipline means freedom.

The whole school year, Mark studied hard, ate right, started every morning with a workout, and also attended jiu classes -jutsu. But right before the summer holidays, he had a big fight with his classmate and he was even called to the headmaster!

Now it seems to Mark that this summer will be ruined, because he will have to spend it in the camp with Nathan - a boy, with with whom he almost got into a fight because he constantly teased him. And he will also have to get to the camp every day on foot, because all the other guys have cool bikes, but he does not! Another problem is jiu-jitsu competitions. Mark does not want to participate in them, because he is afraid of losing. But the good news is that Uncle Jake is back for the whole summer and he will definitely have a plan of action!