The titular medallion is a gift presented to young Nicole Elmi. Once the girl places the gift around her neck, she is possessed by the spirit of a dead child who was a murderess.

The professional mercenary Sir William Walker instigates a slave revolt on the Caribbean island of Queimada in order to help improve the British sugar trade. Years later he is sent again to deal with the same rebels that he built up because they have seized too much power that now threatens British sugar interests.

At the end of the Civil War, a Union soldier is released from prison and travels with a fellow prisoner to Missouri where his travelling companion is shot and hung for horse stealing. California decides to take the dead companion's belongings to his family's ranch, where he falls in love with his friend's sister. But then the "ghosts" of the war return in an unexpected way haunting him again.

Bandits ambush Capt. Roy Dexter of the U.S. Cavalry while he and his men escort a fortune in Confederate gold coins. Only Dexter survives the attack. He's subsequently sentenced to life in prison on the false belief he masterminded the ambush. Escaping from prison, Dexter sets about tracking down and exposing the true culprits.

Following the mysterious decapitation of an insurance investigator, Police Inspector Peretti is put onto the case, but all the clues lead to an unsolved case of kidnapping and murder.

A cop recruits a criminal and his cohorts to help track down a violent crime lord who has kidnapped the ill daughter of a rich family.

In a small Scottish village, horribly murdered bodies keep turning up. Suspicion falls upon the residents of a nearby castle that is haunted by a curse involving a killer cat.

A police commissioner in a little town in the Italian Venetian province investigates a prostitution ring run by two pensioners; during his investigations he also learns that a former manicurist shacks up with ten students, the prefect's daughter prostitutes to keep her pimp, a famous doctor has sex with his young patients, a headmaster has his eyes on the pupils, a noblewoman organizes orgies in her villa, the local convent is run by a lesbian and his actual girlfriend poses for a hardcore magazine. He wants everything to come out in the open but his superiors try to put obstacles in his way.

After the death of her mother under strange circumstances, a teenage girl quickly begins to suspect that her recently widowed stepfather may be involved.

Mike returns home in order to leave his gunfighting days behind him and settle down on a farm with his old sweetheart but things do not go as planned. Finding Jane murdered, Mike is set upon and left for dead by her 7 killers who also steal his life savings of $10,000; all in $50 dollar bills. They leave only seven dollars and Mike vows to track down every man, paying him back with a solitary dollar and death.