A new breed of aggressive, ravenous sharks cracks the frozen ocean floor of an Arctic research station, devouring all who fall through. As the station sinks into frigid waters, those alive must fashion makeshift weapons or suffer the same fate.

A bank heist descends into violent chaos when one of the hostages turns out to be a serial killer. Trapping the well-organized team of bank robbers in the building, the killer is now picking them off one by one.