In Claudia Dey’s endearingly perverse 2006 play, ill-starred fraternal twins Sugar and Grace inhabit a tidily ramshackle cottage beside a dump in northern British Columbia. Phobic recluse Sugar (Angela DiMarco) still wears the track suit her mother died in, while sexy Grace (Sarah Budge) knows more about the outside world. Enter the shaggy, animalistic traveler Trout Stanley (Ryan Higgins). He instantly falls for Sugar and, BTW, might be a serial killer. Kooky can be a trap, but the cast—especially DiMarco—puts a fresh stamp on the whimsical accusations and interrogations. Everything transpires on a single set whose permeable outdoor feel—partial walls, barbeque instead of a range, cooler instead of a fridge—magnifies the sisters’ sense of vulnerability.Amid the banter and plot twists, I often lost track of who the killer was supposed to be. But overall, these “Huh?” moments were greatly outnumbered by “Ha!” moments. MARGARET FRIEDMAN [See Margaret’s full review.]

Thursdays-Saturdays, 8 p.m.; Sundays, 7 p.m. Starts: Feb. 11. Continues through March 6, 2010