“T-Rex” is an intimate coming-of-age story about a new kind of American heroine. For the first time ever, women’s boxing is included in the 2012 Olympics. Fighting for gold from the U.S. is Claressa “T-Rex” Shields, just 17 years old, and by far the youngest competitor. From the streets of Flint, Michigan, Claressa is undefeated and utterly confident. Her fierceness extends beyond the ring. She desperately wants to take her family to a better, safer place and winning gold could be her only chance.