All Summers End 2017.A teenager tries to deal with his guilty conscience after his role in a prank that causes the death of his girlfriend’s older brother.
Conrad (Sheridan), Hunter (Abrams) and Tim (Lee) are close friends living in a small town. Grace (Dever) takes a liking to Conrad and they start spending a lot of time with each other, which stresses Conrad’s relationship with Hunter and Tim. Having promised Hunter and Tim that they could hang out on Independence Day, Conrad declines an invitation to watch the fireworks with Grace’s family. The three boys drive around the town stealing garden ornaments and Conrad – on a dare – goes to steal a plant from the porch of Grace’s house. Unbeknownst to them, Grace had earlier had a fight with her brother Eric, who has consequently stayed home while Grace and her parents went to see the fireworks.
The boys are nearly caught and Eric gets in his car, chasing them to the outskirts of the town. The boys narrowly avoid a deer that wanders onto the road but Eric hits the deer and crashes into a tree. The boys argue about whether to call for help, but leave the scene hoping that someone would pass along soon. The next day, word spreads through the town that Eric has died. Grace is ridden with guilt due to her fight with Eric and finds comfort in Conrad, who has fallen out with Tim and Hunter due to their refusal to help Eric at the accident scene.
Conrad tries to tell Grace the truth but is interrupted by her parents. As Grace finds comfort in Conrad, the two become close. On the night that Grace’s parents go away to Eric’s college to pack up his dorm room, she loses her virginity to Conrad. Grace leaves to go to church the next morning, telling Conrad that he would have the house to himself but her parents return early. Grace’s parents discover the discarded condom wrapper and, feeling betrayed, ask Conrad to leave.
Grace has a fight with her parents and goes to look for Conrad, finding him in an abandoned house he had shown her earlier. Conrad, now in distress, confesses to Grace and she leaves, telling him that she never wants to see him again. Conrad goes home and tells his mother what had happened. Following this talk, he takes goes to see Grace’s parents to tell them the truth and return the plant.
It is revealed that an adult Conrad eventually marries and has a son, whom he names Eric.