A village hall, a primary school play, a beautiful Lake District town in England. Into this idyllic scene steps a lone gunman whose actions set off a train of events that will have devastating consequences for the close-knit community of Stonesmere.
In the weeks following the cataclysm, conspiracy theorists start questioning what happened. Two young people find themselves at the epicenter of the uproar: Marty, the town's golden girl and daughter of a teacher killed that day, and Trent, whose memories of his brief time trying to fit into Stonesmere fuel his attachment to the conspiracies.
But what really happened at the Day One assembly? What secrets is Marty keeping and what blindspots does Trent miss? In this world where news travels fast, and videos and gossip travel faster, how does a community move forward together?
