The pilot was still alive when they pulled him out but his passenger was dead. Pieces of the single-engined four-seater Beagle Pup were scattered in and around Fortrose yet, in spite of all the mess, Chief Inspector Thane expected it to be a straightforward aircrash.

But Colin Thane was wrong. It was soon clear that more serious crimes were hidden in the wreckage of the plane and also in a tiny flying club in the Highlands. From Glasgow to Glenfinn, he finds all the evidence of organised crime - but needs one strong lead to stop it.