When Sally O'Brian is asked by her friend Alan Ripple to rid his boat of ghosts, she is caught off-guard. Of all people, she never expected Alan, a dedicated scientist and a no-nonsense kind of guy, to believe that she could see and talk to ghosts. Unfortunately, Sally has promised her daughter Jennifer and her son-in-law Jack that she will not get involved with any more ghosts or police investigations. Jennifer and Jack are not going to be happy with her.