The fallout from DCI Serena Flanagan's last major case, which saw her home invaded and her husband attacked, has left the previously close family fractured.

When Serena is asked to sign off the suicide of a severely disabled local businessman, she finds herself envying the grieving widow's comfortable life and devoted marriage, until the widow's close relationship with the local reverend start to sound an alarm. But with a clean crime scene and no evidence to back her up, have Serena's instincts led her down the wrong path?

With her husband struggling to deal with the aftermath of an attack that nearly cost him his life and her young children anxious and unhappy, Serena's determination to unlock the mystery of what happened in that house may cost her her job - and her family.