Perfect Sisters

If, as in the phrase popularized by Mark Twain, there are three kinds of lies—lies, damned lies and statistics—then there are also at least three different kinds of true stories, which, when adapted for the big screen, are most assuredly not wielded with equal strokes of grace and credibility. Rich evidence of this exists in the form of Perfect Sisters, a surprisingly tension-free drama starring Abigail Breslin and Georgie Henley as siblings who start to entertain thoughts of matricide.
Neither touching the rich, charged atmosphere of Heavenly Creatures, nor aiming for something more darkly comedic or rooted in social commentary, director Stan Brooks’ film instead exists in a soupy, unpersuasive middle ground. Simply being based on a true-crime case from around a dozen years ago is inherently interesting enough to sustain an entire narrative framework, its filmmakers seem to think. That instinct proves wrong.
Separated by only a year, teenage sisters Sandra (Breslin) and Beth (Henley) are extraordinarily close—lifelines to stability for one another in a shared life still defined by the lapses in judgment and responsibility of their alcoholic mother, Linda Anderson (Mira Sorvino). (They also have a seven-year-old half-brother, though he’s largely shunted to the side here.) When another characteristically scummy in a long line of abusive boyfriends, Steve (James Russo), enters the picture with Linda, it pushes the girls past a breaking point. They begin to ponder killing their mother in order to create normal lives for themselves, and even talk openly with a couple high school friends, Justin (Jeff Ballard) and Ashley (Zoë Belkin), about how they might plan her death and make it look like an accident.
Perfect Sisters is adapted from a book by Bob Mitchell, The Class Project, but screenwriters Fab Filippo and Adam Till never strike upon a settled, convincing tone. There are moments of engaging kinship and understanding between Sandra and Beth, but these feel due to Breslin and Henley’s chemistry and respective chops as much as anything else. The aforementioned Steve seems a character rented straight from Central Casting, and the girls’ aunt, Martha (Rusty Schwimmer), is never quite effectively developed as either a scold or a lifeline.