Nick, an American gambler, arrives in San Paolo and falls in love with Colleen, an American tourist, after she loses all of her money at the casino. Nick flees with Colleen after they are framed for murder and he tries to track down the real killer.

After three men are convicted of bank robberies, Charlie becomes suspicious. After some investigation Charlie finds the men are innocent and that the fingerprint evidence used to convict them had been forged. Charlie then proceeds to find the true bank robbers.

Police sergeants Johnson and McManus take on Los Angeles confidence tricksters. Con man Tony Wells, lining up rich widow Jessica Royce as his latest mark, sets up a false paranormal society with other charlatans to convince the credulous Jessica that her late son is speaking to her through their sham seances. When the plan leads to murder, Johnson and McManus must bring the group down before they kill again.

Nick Cherney, in prison for embezzling from Torno Freight Co., sees a chance to get back at Johnny Torno through his young priest brother Jess. He pays fellow prisoner Rocky, who gets out a week before Nick, to murder Jess... who, dying, tells revenge-minded Johnny that he'd written a clue "in the Bible." Frustrated, Johnny obsessively searches for the missing Gideon Bible from Jess's hotel room.

Marine veteran Johnny Christopher meets and is immediately drawn to beautiful Evelyn Smith one day on the beach. Evelyn's new job as secretary to a U.S. senator in California soon brings unexpected intrigue and trouble for her and Johnny. The machinations of a sinister group of Nazi spies lead to mysteries and mistaken identities, and the two soon find themselves framed for murder!

Aliens have landed and are hiding on Earth, but need Earth’s scientists to help them fight an inter-planetary war.