一帮雇佣兵偷走了匈奴王的预言宝剑，引发了一个古老的诅咒。所有神话中最恐怖的造物Cerberus将被唤醒。这只恐怖的三头犬有一条蜿蜒的尾巴，而且嗜血成性。In Bucharest, Romania, the priceless breastplate of Attila, the Hun is robbed from the National Museum of Antiquities by a gang leaded by the despicable Marcus Cutter, and the curator Radu is killed by one of the thieves. Meanwhile, in New York City, the former assistant of Professor Radu, Dr. Samantha Gaines, is waiting for the valuable piece for an exhibition. The agent Jake Adams visits Samantha in the museum to tell about the heist and the death of her friend, and she tells about the legend that the breastplate would have the inscription of the location of the Sword of Mars, which is guarded by Cerberus and made Attila invincible. When Samantha's brother and addicted gambler Jack is kidnapped, she believes his debt of US$ 2,000.00 could be the reason, and travels to Romania invited by the evil kidnapper Kul Jae Sung, getting involved in a supernatural adventure with Jake.
