A house on a quiet street on the southside of Glasgow. Neat, terraced homes with manicured lawns and pruned trees. Not the sort of place that reeks of decay or where dead bluebottles pile up on a windowsill.

When the police break in, there's a surprise in store for them. They find Julie Campbell's decaying body at her desk, her laptop open beside her. She's a well-liked, respectable woman. On the laptop is a confession - to five murders. There's one major problem though - only one of the victims she names is actually dead.

DI Mark Nicholson is persuaded by his boss DCI Alex Scrimgeour that the confession is a fantasy, and to drop the case, but Mark senses there's more to it than meets the eye. As he delves further, the darkest of secrets are revealed, and everyone around him is dragged into a vortex of fear, danger and murder. No one is beyond suspicion as The Confession becomes a murderous reality.