Closed fights without rules are not for the weak. The best of the best fight there, bones crack there, blood flows there. Only the strongest wins. And even in such a situation, professional fighter Alexey Sorokin remains a normal person. But one “beautiful” day everything changes dramatically. Alexei's best friend suddenly turned into a bloodthirsty beast. He began to literally tear his rivals to pieces. No one can defeat him. Soon it will be Alexei's turn. Sorokin cannot refuse a fight with his former friend, but defeating this beast will not be easy...