Adding to the complications, Enid's sister Marcy-a TV star-arrives for a visit.  Marcy's soap opera POUGHKEEPSIE has just been axed by the network, so Marcy can no longer afford to help maintain Enid's home.  Marcy also demands that Enid not make the slasher movie, because it could remind the public of past scandal.  Thereupon, Enid "accidentally" breaks her sister's leg.

Marcy is forced to stay in the house, where Enid and Zachary can care for her and where Marcy reluctantly helps Enid rehearse for the slasher movie.  Meanwhile, Marcy's scoundrel ex-husband, Chad Walker, tracks her down.  Desperate for money, he barges into the house and gets in a tiff with Enid:  she kills him in self-defense. Marcy discovers the body, whereupon Enid locks Marcy up to keep her quiet.  As Marcy vainly tries to escape, Enid marches off to start her first day of filming CHOP CHOP.  More bedlam occurs, as Rosemarie Clinger, a movie fan, sneaks into the house.  Rosemarie is viciously murdered, her screams heard by Marcy.  Hours later, Enid-fired after one day's shooting-confronts Marcy.  Surprise revelations (including one reminiscent of PSYCHO) follow, resulting in the sisters' reconciliation-but only momentarily.  At curtain, the sisters are back-fighting as vociferously as ever. Requires a cast of 6 (four females, two males; cast can be expanded) and unit set.  Visit website: http://www.michaelcolby.com/slayitwithmusic.html