Mack Meyer (Rachele Schank) has built a large fanbase discussing true crime on her wildly successful podcast “How I Met Your Murderer”. However she finds herself the center of the story after learning her husband (Billy Armstrong) was involved in the death of his high school sweetheart, LILY. With the help of her new neighbor, Oliver (Chris Zylka) and podcast producer June (Nicole Jia), Mack links Lily’s death to other murders and fears her husband may be a serial killer.