The World of Tim Frazer was the longest-running BBC serial of the early Sixties, and one of the most successful. The popularity of these TV programs inspired Francis Durbridge to write several novels featuring the easygoing engineer–turned–spy Tim Frazer. In this one, Frazer becomes involved in another difficult and dangerous case. When special agent Leo Salinger is killed by a fast car in Amsterdam, Tim Frazer is sent over to trail the attractive young woman who was at the wheel. Was it a genuine accident? So it seems, until Frazer returns to London and encounters a body instead of an evening date. The case grows more complicated at every turn. What sinister implications lie behind an innocent bulb catalog? What is the mystery of the metronome carried by the dead man? It is only Frazer's second assignment - is it going to be his last?