Greg Sanderson is helping his wife, Jan, to recover from a nervous breakdown and revive their strained marriage. Their privacy is interrupted by the arrival of Greg's stunning and mysterious sister, Laura. Jan's paranoia deepens as she suspects that Greg's and her sister's relationship is too close. In her desperation, she confides her fears to the landlord but his weird reaction only creates more confusion.
| Art | Carlos Barbosa | Production Design |
| Production | Barbara Javitz | Executive In Charge Of Production |
| Camera | George Hosek | Director of Photography |
| Directing | Viktor Kulle | Director |
| Writing | Peter Culley | Screenplay |
| Production | Michael Canale | Producer |
| Editing | Jack Tucker | Editor |
| Production | Carolyn Long | Casting |
| Costume & Make-Up | Inger Ostrom | Makeup Artist |
| Costume & Make-Up | Deborah Slate | Costume Design |
| Production | Naofumi Okamoto | Executive Producer |
| Production | Gary Preisler | Producer |
| Production | Peter Colley | Associate Producer |
| Production | Steven Paul | Producer |
| Sound | Robert J. Walsh | Original Music Composer |
| Art | Richard Brunton | Art Direction |
| Art | Ellen Brill | Set Decoration |
| Costume & Make-Up | Desne J. Holland | Key Makeup Artist |
| Costume & Make-Up | Inger Ostrom | Hairstylist |
| Production | Eric M. Breiman | Line Producer |
| Production | Michael Scordino | Executive Producer |
| Production | Barry L. Collier | Executive Producer |
