In rural Devon, six-year-old Joanna Mason witnesses an appalling crime.

Thirty years later on the man convicted of the crime is released from prison.

In Edinburgh, sixteen-year-old Reggie works as a nanny for a G.P. But Dr Hunter has gone missing and Reggie appears to be the only person who is definitely worried.

Across town, Detective Key Inspector Louise Monroe can be buying lacking person, unaware that hurtling towards her is an older friend — Jackson Brodie — himself on a journey that becomes fatally interrupted.