After the mysterious death of her undercover cop husband, a female martial artist must protect her daughter from corrupt police, politicians and hired assassins who will do anything to conceal the truth.

Marisa and Dino are in one school and one class. Between them there are often quarrels over minor matters. Dino's friends are annoyed with Dino's always giving in, as well as Marisa's friends who like to give advice to Marisa, but Marisa doesn't care, Marisa is still mean to Dino.