From the outside - they’re perfect. Wealthy, educated, compassionate, veteran, with 5 children in a blended marriage. When Kathleen is found dead at the bottom of the staircase - all of the Petersons' family secrets come to light. We have more questions than ever… IF she fell (like Michael Peterson claims) why was there blood soaking the floor & walls? Why did Michael delete personal emails right after he found out his wife died? Why do people believe an owl (the bird) killed Kathleen? And what about the other woman in Michael’s life found at the bottom of a staircase?