Samantha Caine (Geena Davis) is a small-town schoolteacher, living with her boyfriend Hal (Tom Amandes) and her daughter Caitlin (Yvonne Zima). Eight years earlier, she was found washed ashore on a New Jersey beach, pregnant with Caitlin and totally amnesiac. Having never remembered her real name, "Samantha" has hired a number of ineffective private investigators to discover her past, the latest being a lowlife named Mitch Henessey (Samuel L. Jackson). During the Christmas holidays, Samantha is involved in a car accident and suffers a brief concussion; when she recovers, she finds she possesses skills with a knife that she cannot explain. Shortly thereafter, the family home is broken into by "One-Eyed Jack" (Joseph McKenna), a convict who escaped from jail after seeing Samantha's face on television. Samantha demonstrates her fighting prowess by killing Jack bare-handed. Worried that she poses a danger to Hal and Caitlin, Samantha leaves with Mitch, who has found a suitcase belonging to her, to seek out answers.