Someone attempts to take the life of writer Max Pomeroy, Tony Blake's friend. Upon investigation, Tony discovers an illegal gambling operation that Max is about to testify against before a grand jury. Tony gains the friendship of a disgruntled casino operative named Diane Thompson, and uses it to penetrate the casino's veil of secrecy. Using his card and dice handling skills, Tony is able to clean up on the house, but he soon finds his own life is in danger. His investigation culminates in a wild ride on the top of a hijacked ambulance.

Magician Anthony Blake is setting up for a fund raising performance outside a church when a man, chased by two pursuers, stumbles onto the stage, trips over a piece of the rigging, and causes a scaffolding to collapse. The next scene finds Tony and the man, who he later finds out is named George, in a hospital room, Tony with a few bruises and George with amnesia. When the pursuers find George at the hospital, Tony rescues him and brings him to his friend, Max Pomeroy. Showing him a few pictures, Tony and Max are able to jog George's memory about an acquaintance, racecar driver Tim Dunnagin, whom George immediately runs out to see. Dunnagin reminds George that they were involved in a robbery 30 years earlier and that $1.6 million worth of loot is still hidden. Only George will be able to remember where it is--if he is able to get his memory back--but Dunnagin can be ruthless as well as impatient.

Tony Blake has taken up residency at The Castle, an exclusive club for magicians, when his old girlfriend Janet Keegan comes to visit--not to get back together with him, but because she is being pursued by two men and doesn't know why. Her father, Charles, who used to be involved in bootlegging and other shady activities, may be involved. Despite Tony's efforts to protect her, the men catch Janet and hold her hostage to keep her father from interfering with a planned robbery, and Tony must rescue her from the prison in which they are holding her.

Tony Blake fails to rescue Janet from the jail in which the kidnappers are holding her. Soon he finds himself caught between the kidnappers, who have put out a contract on Janet, and her own father, who thinks Tony's efforts to rescue her are actually interfering with her safe return. Tony eventually steals into the currency printing plant that the kidnappers have taken over and tries to devise a way to rescue Janet.