When the epic San Antonio flash flood strikes, churning everything in its path for days, 15-year-old Jody Phillips fears that her beloved Morgan stallion, the magnificent Legacy, who has been swept away from his stable by ferocious waters, has perished. As the casualties mount, Jody and her father Ted team up with others whose lives have also been changed forever by the disaster. Friendships and love blossom in the most unexpected ways as Legacy's "searchers" overcome huge odds-trusting their instincts, their pursuit of the truth, and their compassion for one another's losses-as they push forward to find Legacy, dead or alive.