In 1958 Peter Manuel breaks into a suburban villa in Glasgow and murders three members of the Watt family. William Watt, the father, a successful businessman is promptly arrested for the crime. But police aren't able to find enough evidence to charge him so he is released. Determined to clear his own name, Watt offers to pay for information. Peter Manuel contacts him and offers to help. The two men meet in a bar and spend the next twelve hours drinking together. But no one knows what happened that night. The novel reimagines the night Peter Manuel and William Watt meet, attempting to make sense of one of the most intriguing true crime cases in legal history.