The Pool (2018)

Day drifts off on a raft while scrubbing an empty, six-meter-deep pool, left to handle the task solo. When he stirs, the water has drained too low for him to scale the walls unaided. Trapped in the echoing basin, he shouts desperately for anyone to hear, yet his cries are answered only by a predator that has slipped loose from a neighboring crocodile farm.