Unruly police detective DCI Charlie Hicks is deeply suspicious of his new partner DI Elaine Renko. But their first investigation exposes a secret that will connect them for life...

Renko persuades a newspaper to publish the Hard Sun dossier. The government shuts down the story but the detectives investigate a killer for whom the 'Hard Sun hoax' is very real.

A murderer confesses to a priest that he wants to challenge God into revealing himself by targeting those who help others.Grace makes Hicks an offer.