Mark Smith presents the ultimate moral dilemma in a breathtaking psychological thriller. Would you try to save them?

'First rule of rescue: don't create another casualty.'

Grace Disher is about to face every teacher's worst nightmare.

Three of her students are going to die.

On a high school camping trip, three boys slip away for an ocean swim. By the time Grace catches up, the perilous surf conditions are overwhelming the teenagers. If she goes in, she will die trying to save them.

Should she have given her life?

The question haunts Grace as investigations begin and her decision not to attempt a rescue comes under scrutiny. Hounded by conflicted staff, grieving parents and relentless media - all dissecting her actions, all looking for someone to blame - Grace's safety is compromised and she must be careful who she trusts.

And she's not the only one with a secret.