Nathan Stone hasn't long got back from a holiday but he could already do with another one. Between a murder, an unexplained drowning, a trio of assaults, a missing teen, and an interdepartmental dispute over jurisdiction, he's under so much pressure he barely has time to sleep.

All of that would be bad enough without one of the assaults having occurred on his best friend, Louisa Orchard, leaving her in the same ITU where his wife died.

He's determined to catch the people responsible, despite the strain that such a busy caseload and worry over his best friend is having on him.

Can he keep himself together and awake long enough to solve the cases and hopefully see Louisa recover from her injuries?