Statuesque martial arts doyenne Cynthia Rothrock stars in Undefeatable. As in most of her films, Rothrock's principal motivation is revenge. When her sister is murdered by a serial killer, she lays a trap for the villain. Unfortunately, the killer is also well-versed in martial arts. This Undefeatable should not be confused with the 1994 adventure flick of the same name starring Stan Kang.