I was on a high after watching Imaginary and decided to check out Night Swim. I waited for this movie to make sense and then it just went off. What is the ghost/demon? What's it's origin story? Why is it out during the day if thise is titled "Night Swim?" Why/how did the dad's condition improve? Why can it control all water outside of the pool? Just stay out of the pool, problem solved. Turrible...