In this episode, an evil spirit wearing a wedding gown haunts Melinda's friend Lisa. The spirit, called Serena, is very opposed to moving on and presents a tough challenge for Melinda. This spirit is special, Melinda learns, because she died on the day she married Lisa's current fiancé. The jealous, vindictive Serena has her heart set on destroying the wedding and the couple, and does everything in her power to interfere with Melinda's attempts to set things right.