Steeped in a history of award-winning Yorkshire ale, the town of Markham boasts not one but two breweries. Richard Foster runs one; his sister, Emily, along with her partner, Janice, runs the other. And not without some resentment.

The unwelcome return of the town's former bad boy, Brendan Scholes, threatens to ignite the sibling rivalry further. Scholes claims to have found the long-lost secret recipe to the beer that made Richard and Emily's father famous, and he wants money.

But it isn't long before Scholes' body is found floating in a fermentation tank at one of the breweries, his head caved in by a hammer. DCI Oldroyd and Andy Carter are called in to investigate the murder, and there's no shortage of suspects.

As rumours of the possible existence of a recipe for the famous beer spread against a backdrop of growing homophobia and misogyny, tempers run high. With Markham's beer industry at stake, a killer on the loose and the town's residents out for blood, Oldroyd needs to solve the murder before someone else is killed...