Shaun Russell takes her son and daughter on a weekend getaway to her late father's secluded, high-tech vacation home in the countryside. The family soon gets an unwelcome surprise when four men break into the house to find hidden money. After managing to escape, Shaun must now figure out a way to turn the tables on the desperate thieves and save her captive children.
Ninja Assassin follows Raizo (Rain), one of the deadliest assassins in the world. Taken from the streets as a child, he was transformed into a trained killer by the Ozunu Clan, a secret society whose very existence is considered a myth. But haunted by the merciless execution of his friend by the Clan, Raizo breaks free from them and vanishes. Now he waits, preparing to exact his revenge.