We've all had sleepless nights thinking about it.
You're home alone. Someone breaks in.
In defending yourself, you end up killing the intruder.
Now you're the one the police want.
That is the situation that criminal barrister Paul Reeve arrives home to find.
His wife Alice stands in the bedroom, clutching a bloodied letter opener in her shaking hand.
"What have you done, Alice?"
"I didn't have a choice..."
We would all believe the person we love most.
But would we all make the same choice Paul and Alice make next...?