You didn't waste it.
Two brothers want to send off their late pet fish in their park's pond. The pair then find themselves stuck in the water, which leads to a discussion of time, relationships, and what movies even are.
A conversation Harper has with herself in her own head, interjected with the moments in which she is recalling. Some sort of event sent her into an existential state of mind, where she can't help but think about who she is, and how much control she really has over her life.
Cadet, a bright-eyed third-grader, dreams of going to space. While being held inside for detention, she is rescued by two strangers who need her help.