In Paris, two workers find a hidden chamber while digging the underground of the Saint Jean André Church. They collect the valuable objects in the spot but they are attacked by a creature. Meanwhile, the discredited Professor Jack Randall, who wrote a book about Gargoyles rejected by the experts, is encouraged by his friend Carol Beckham to peek the place out. They sneak in the site during the night and while Carol is collecting some artifacts, Jack is recording with his camera. Out of the blue, Jack sees a winged monster coming towards him and he flees from the location with Carol, but breaks his camera. They go to a bar and a huge stone falls over his car. Jack takes a cab to his boarding house and Carol is attacked and beheaded by a Gargoyle at her apartment. On the next morning, Jack identifies Carol's body and becomes the prime suspect of Inspector Gibert of several murders...

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.

Jules Daly is struggling to raise her orphaned niece and nephew (Maggie and Milo) alone, but it isn't easy after getting downsized out of her antique sales job while Milo rebels against the death of his parents through petty theft. With things looking bleak for Christmas, an English butler named Paisley arrives with an invitation for all to come see the kids' emotionally distant grandfather who lives in Castlebury Hall, somewhere near Liechtenstein. With nothing to hold them back, they go, but the grandfather - Edward, Duke of Castlebury - is rather cold over their visit to his castle. So is his other surviving son, Ashton, Prince of Castlebury. Before long, they're all having a good time and looking forward to hosting a Christmas Eve ball, but Jules overhears a conversation from which she draws a wrong conclusion.