Five strangers. Two deaths. One secret.

When disgraced journalist Jen Hunter witnesses a horrific murder-suicide alongside four strangers, she goes into shock. They all saw Daniel kill his girlfriend - but can they trust their own memories?

Jen's best friend, Bex, is worried. She knows Jen hasn't always been stable. She knows about the lies. She knows why Jen lost her job at the paper.

As the lives of the witnesses begin to unravel, one thing becomes clear: there is more to what happened that day on Hampstead Heath.

And Jen needs to find out the truth - even at a cost.