Contract: The Godfather's Prisoner

At a clandestine casino in Chicago, undercover agent Caleb fails to assassinate mob godfather Valentino. Using Caleb's gravely ill sister as a hostage, Valentino forces him to sign a contract and become a private debtor, then places him under house arrest. The underboss quietly makes things difficult, and Valentino forces Caleb to attend a dangerous underworld banquet with an empty gun.