She Kills Monsters follows Agnes Evans as she prepares to leave her childhood home after the death of her parents and teenage sister, Tilly. While packing up her sister's room, Agnes discovers a custom Dungeons & Dragons module written by Tilly. Seeking closure and a better understanding of the sibling she feels she never truly knew, she enlists the help of a local Dungeon Master, Chuck, to play through the game. What begins as a search for connection becomes a high-energy journey into the fantasy world that served as Tilly's refuge. Filled with homicidal fairies, fearsome ogres, and '90s pop culture, this fast-paced dramatic comedy is a heartfelt tribute to the geek and the warrior within us all.