A group of vigilantes concealed behind animal masks pursues and punishes those guilty of evil deeds.

Killer Instinct is an American crime drama television series filmed in Vancouver that originally aired on the Fox Network. The pilot episode aired on September 23, 2005, and the final episode aired on December 2, 2005.Fox ordered 13 episodes, only nine of which were broadcast in the United States; the remaining four premiered in the UK on Five. The series also been broadcast in France, New Zealand, Croatia, Italy, Netherlands, Australia, Japan, and Poland.

Killer Instinct is an American crime drama television series filmed in Vancouver that originally aired on the Fox Network. The pilot episode aired on September 23, 2005, and the final episode aired on December 2, 2005.Fox ordered 13 episodes, only nine of which were broadcast in the United States; the remaining four premiered in the UK on Five. The series also been broadcast in France, New Zealand, Croatia, Italy, Netherlands, Australia, Japan, and Poland.

The boss asks his wife to avoid Saipan, where he and the other members of the organization are, because her secret mistress is there. However, Min Ji falls in love with Sang Hoon, a member of the organization who was also there. The boss, who won't believe Min Ji, sends the killer to investigate the situation, and after the killer arrives in Saipan, he reports their movements to the boss one by one.