"A seemingly innocent conversation soon turns into a nightmarish and dangerous reality for Guy Haines when he meets Charles Bruno on a train journey. Ahead lies a lethal nightmare of blackmail and psychological torment that threatens to cost Guy his career, his marriage and his sanity. His choice: to kill, or to be framed for a murder he didn't commit."
Sounds intriguing, tickets can be found here:
I'm in Dress Circle, A30.