Zosimus, the patriarch, is about to die, and Leonidas, the youngest monk in his community, sees it as an omen of their grim fate. Deeply shaken and forced to venture into the city, Leonidas discovers a brotherhood of an entirely different order than his own: the bodybuilders of the Boa Gym. Convinced that he is destined to save his congregation from their own weakness, Leonidas rediscovers the power of his physical body and begins a radical transformation.