Murder in a mill town

When a violent murder shatters the otherwise peaceful idyll of Andaby near Hebden Bridge, DS Charlotte Banks can't help but suspect that her brother Ewan is behind it. Ewan claims he's innocent, and even has an alibi to prove it, but DS Banks isn't convinced. So much so that she turns to the only people who can help her in an investigation this personal: Kitt Hartley and Grace Edwards.