When Lady Màiri Nic'Illeathain is murdered on the Isle of Harris, newly qualified family liaison officer PC Kat Crichton is assigned to the case.

A high-profile case like this is the career opportunity of a lifetime but for Kat, this is not just a job. A decade earlier, she got caught up in the twisted web of the MhicIllEathain family and was forced to flee the island. Ten years older, a resolute Kat now returns, determined to bring the killer to justice.