After surviving a shark attack a young woman is plagued by nightmares of being stalked in the dark sea by a ravenous predator, and hallucinations of visits from her sister and boyfriend, both who were killed in the attack.

Una afluencia masiva de deshielo de los glaciares desencadena una nueva era de hielo en el hemisferio norte, lo que obliga a una familia a abrirse camino a través del paisaje cubierto de hielo antes de que se congelen para siempre.