Mia returns to her father's struggling boxing gym with her two-and-a-half-year-old son, Leo—only to find it threatened by ruthless rival Victor, who wants the property through debt and sabotage. What Victor doesn't know is that Leo has impossible strength: he can stop falling equipment, drag grown men, and send Victor's enforcer flying—though everyone assumes it was an accident. Mia makes one rule clear: Leo is never to be used as a weapon, and she will win back their home.
