Two sisters are unwittingly trapped under the fiberglass cover of an Olympic sized public pool and must brave the cold and each other to survive the harrowing night.
Jonna is named as an homage to Jonah from the Old Testament a character who is trapped in the belly of a whale.
The sisters recover the engagement ring but never think to use it to cut a hole in the fiberglass cover. If the stone in the ring is a diamond, it would cut through fiberglass.
Dive deep into IMDb Picks, Scary Good, TV, and more.