Inspired by true events, two sisters are trapped under the fiberglass cover of an Olympic sized public pool and must brave the cold and each other to survive the harrowing night.
Did You Know?
Jonna is named as an homage to Jonah from the Old Testament a character who is trapped in the belly of a whale. See more
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. See more