A chance meeting with a Schlecht agent forces a humble coffee shop manager into the secret world of spies in Swinging London. With the help of his MI5 friend, he poses as the recently dead Major Cavendish who had managed to infiltrate the dreaded organization; he knows that they are intending to assassinate someone - could it be the famous Russian ballerina who has recently arrived for an appearance at Covent Garden?

An Eastern cult discovers that the sacrificial ring is missing. Ringo, drummer of The Beatles band has it; sent by the girl (who's to be sacrificed) as a gift. Clang, Ahme, Bhuta and several cult members leave for London to retrieve the ring. After several failed attempts to steal the ring, they confront him in an Indian restaurant. Ringo learns that if he does not return the ring soon, he will become the next sacrifice. Ringo then discovers that the ring is stuck on his finger. Its a race against time; John, Paul, and George try to protect their friend while they're all being chased not only by Clang and his minions, but also by two mad scientists and the chief inspector of Scotland yard. Will Ringo be saved, or will he be sacrificed?

Two dogs escape from a laboratory and are hunted as possible carriers of the bubonic plague.