As her adoptive mother lays dying, journalist Cara Joyce overhears a shocking piece of information about her origins. It connects her to a tragic death - that of Lucia Casey, a young woman whose body was found buried in a Connemara bog nearly thirty years ago.

To this day, Lucia's disappearance and murder remains unsolved. Cara's quest to find out the truth reunites her with the powerful Casey family. But as her obsession begins to take over her life, she finds herself increasingly at odds with those around her.

Who is behind Lucia's death and what are they hiding? And what will Cara risk in the present to solve the mysteries of the past? Somebody Knows is a page-turning story of dangerous secrets and the lengths people will go to keep them.