"Simon paid off the driver and turned to follow Mrs Twite. But she seemed to hav
e locked the door behind her and, as he rattled the latch unavailingly and then
rapped the locker, something dark and suffocating was forced down over his head
and a pair of hands gripped his throat." Simon, coming to London to study painti
ng with his old friend Dr Field, finds he has vanished without trace. Determined
to discover what lies behind his disappearance, Simon is trapped in a fiendish
plot.