Cristian “La Serpiente” Bosch is a Muay Thay fighter from Greater Buenos Aires. At thirty-five, he has his last chance to fight for the world title, against the Brazilian champion. With a great force of will, Serpent prepares for combat, but his obligations as father, son, teacher and friend will make the road difficult. The changes in his life will mark him forever and when he reaches the final fight, he will no longer be the same.