When an ass in coveralls attracts him after a dry spell, Grant Carlton wants to know more about the new mechanic at his friend's garage. Then he finds there is more going on with the garage, the decline of his old friend's health, and the gorgeous man in those coveralls working on his favorite car, a '65 Mustang. Unable to walk away, Grant finds ways to help and be around his new mechanic. Morric Donahue struggles with being a parolee, not wanting to lose control after stepping outside the prison walls, especially knowing he never committed the crime. Wary of all commitments which don't include engines, he keeps a close eye on the enticing rich boy who keeps coming around. While he admires the hot muscle car, he wants to know more about the man driving it, even if it means going outside his self-imposed cell.