Sunshine is a coming of age story set in modern day America. The movie follows Sunshine, a teenage girl who is struggling to find herself in the world. Her mother, who was diagnosed with schizophrenia, has been institutionalized and her father is away on business. Sunshine is left alone to fend for herself. As she gets older, she begins to take on more responsibilities in the household. Sunshine befriends a girl her age named Emilia, who has also lived with her parents and been deployed.