| Mystery, Thriller
A lighthouse keeper has been murdered in mysterious circumstances and, during the ensuing investigation a Phantom Light keeps appearing at the scene of his death.
The inscription in the wall of the lighthouse is the opening line of Psalm 127: "Except the Lord build the house, they labour in vain that build it."
I'm going to tell you the truth.
Sam Higgins arrives at Tan y Bwlch to take a boat to the North Stack lighthouse offshore. Both places exist but are about 60 miles apart. Tan y Bwlch is on the shore of a reservoir, not the sea, and North Stack lighthouse, on the isle of Anglesey, is onshore, not off.