The movie "After Ever Happy" is the fourth installment in the "After" series, which is based on the novel of the same name by Anna Todd. The story picks up where the third installment, "After We Collided," left off. Hardin Scott (Austin Stowell) and Tessa Young (Joey King) are still reeling from the aftermath of their tumultuous relationship. Hardin's past continues to haunt him, and Tessa is struggling to come to terms with her own feelings.