Antonia "Toni" Gallo is head of security in a Scottish biotech lab that develops vaccines. On Christmas Eve, gangsters break into the lab and steal a vial containing a deadly virus. Toni follows the criminals to the lab owner's home, where the industrialist and his entire family have gathered for Christmas. When a blizzard forces the gangsters to seek refuge among them, violence soon breaks out and the thugs are ready to unleash the virus if need be. Toni must retrieve the virus at all costs...
