Trina Chau is a teen delinquent from Vietnam. A free-spirited rebel born from an Amerasian family, Trina is a member of a street gang who, in spite of disciplining herself by training vovinam, can’t seem to escape the dark world of juvenile delinquency, until one day, after being chased by a trio of Orion agents, Trina proceeded to beat them down easily, eventually leading to her receiving plane tickets to Japan from an unknown sender, urging her to join the Sentoki tournament. While initially hesitant, Trina eventually decides to join the tournament, not knowing that it was a trap set up by Orion.