Grass stains is a drama on maturation that tells the story of a 15-year-old boy from a small American town named Conrad (Tai Sheridan). When an innocent joke leads to the death of Grace’s older brother (Caitlin Dever), Conrad’s first friend, Conrad and his two best friends flee from the scene in an attempt to escape responsibility. But the blame tortures Conrad and he tries to get into Grace’s grieving family in an attempt to correct all the mistakes. Soon she understands that every family member tries to escape the loss in her own way, especially Grace, who has fully devoted herself to her thriving relationship with Conrad. Truth does not give peace to the young man, he has to find the balance between responsibility and the growing longing for love.