A lethal assassin for a secret Chinese organisation, who sheds tears of regret each time he kills, is seen swiftly and mercilessly executing three Yakuza gangsters by a beautiful artist. She is captivated by the grace of his kill and later falls in love with him. An intense power struggle for the leadership of the Yakuza Clans ensues as they seek vengeance for the death of their leader.

When Ruth Whitney abandons her two children with her sister Barbara is left to take care of them, at first none of them like it but soon they grow to like each other. Then over a year later Ruth comes back saying she wants her kids and Barbara goes to court to fight for custody.

Murders in Seoul, Korea and in America pair two cops from each of the countries together to solve the crimes. The investigation leads to a gang war between the Mafia and the Yakuza, but one that may not be of either of their making. A shadowy assassin is killing the leaders and an Italian assassin may have his own agenda.

The adopted son of a sheriff and his wife is kidnapped, but the motive goes beyond ransom.