Philadelphia Detective Dwight Walker calls Virgil Tibbs, planning to come to Sparta for the twins’ birth after he wraps up a big case. Dwight sees three Philadelphia policemen break up a drug buy and kill the buyer and pusher. Dwight then is found hanged at home. Celia, Dwight’s wife, asks Virgil to help find the killers. Meanwhile, Bubba Skinner is drafted to assist Althea with her Lamaze classes.