In this fictionalized, fragmented biopic of one of America's most notorious serial killers, Jeffrey Dahmer (Jeremy Renner) contemplates his latest potential victim, a young man named Rodney (Artel Kayaru). As Dahmer considers the fate of his prey, we see flashbacks to the events that led to the evolution of a monster, from Dahmer's tortured relationship with his father (Bruce Davison), to his first kill, to his patrolling of the gay bars of Milwaukee.