THEY'LL WISH THEY NEVER WENT BACK.

Ten years ago, six teenagers hiked into the Blue Mountains wilderness - and only five came out alive.

The survivors have barely seen each other since the tragic bushwalk. Yet when an invitation arrives to attend a 10-year memorial of their friend's death, Hugh, Charlotte, Alex, Laura and Jack find themselves travelling back into the rugged landscape where it all began.

The weekend at an isolated homestead in the bush - no phone signal, no distractions - should be a chance to reflect and reconnect.

But each of the friends has been carrying secrets from the fateful hike. And someone will stop at nothing to get the truth.