A pilot replacement for 633 Squadron named Chalmont puzzles Frank Adams, the stations intelligence officer. Why should a sensitive young poet volunteer to join a squadron with a warlike reputation?Chalmont is teamed up with Richards and both show high skill and courage but when ordered on a mission which may involve the death of many civilians both pilots refuse to take part. Now they must face court-martial.Like its highly successful 633 Squadron predecessors the novel contains not only high excitement but a moral relevant today.