The idyllic University of Idaho campus in the small college town of Moscow, Idaho, is thrown into turmoil when four popular students are found murdered in an off-campus house on a Sunday morning in November 2022.

Fear and tension rise as students and community members realise the killer is still out there and could be among them at any time; the Moscow Police Department's initial refusal to give more information isn't helping quell the rising tide.

In a shocking turn of events, a suspect is arrested in rural Pennsylvania, seven weeks after the murders. It is someone no one expected, a complete stranger to the friends and family of the victims.

The police and the victims' friends provide a detailed account of what happened in the house on the night of the murders, including details from the eyewitness.