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.
Passengers and crew on a flight are attacked by unseen forces that threaten all aboard.
When Rumpelstiltskin tries to take over Earth once and for all, The Avengers Grimm must track him down through time in order to defeat him.
