Cat burglar Spider Scott, newly released from prison, is determined to go straight, but Fairfax of British Intelligence plans to use Spider's talents for his own ends.
Spider buys a half-share of an executive aircraft charter company. One of his first customers is an old acquaintance from his criminal past, then one of his old friends turns up dead.
Spider is invited to serve on a committee investigating prison conditions, but is soon asked to resign by the committee chairman. He decides to use his particular skills to find out why.
Spider is convinced that the police were tipped off about the break-in. He attempts to get close to Thresher's daughter, but soon finds his life under threat.