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
After the pool heater is shut off it takes only minutes before the water starts feel cold.
In reality a large pool like this with thousand of liters of water (in a heated room no less) would take several days with no heat before the temperature drops enough to even notice. See more