Every 12 years, mercenaries of the highest quality of sheer strength, crafty intelligence, and lethal accuracy meet for the Zodiac Tournament. Each warrior has the name and characteristics of one of the Chinese zodiac's 12 animals. They fight in savage battle, putting their pride and lives on the line, until only the victor survives. The 12th Zodiac Tournament begins in a desolate city, devoid of any evidence of the half million people who recently lived there. To enhance the stakes, each fighter consumes a toxic gem, putting a time limit on the tournament—and their own life. The Zodiac Warriors begin their merciless struggle for survival, with one wish for the winner up for grabs.