In 'Day One,' Abigail Dean crafts a compelling narrative focusing on a small Lake District town in the aftermath of a horrifying school shooting. Marty, the daughter of a teacher who died on that fateful day, tells a story of witnessing the gunman's entrance and the tragic events. However, discrepancies in her account raise unsettling questions. As conspiracy theorists circle, eager to expose their version of the 'truth,' a community reeling from loss and guilt becomes the center of a media storm. Through different perspectives, 'Day One' delves into the heart of a tragedy and the maelstrom of speculation and obsession that follows. Marty's truth is threaded with the trauma of those affected, revealing humanity's fraught relationship with disaster and the complex journey towards healing.