Fit to be tied in Aurora's powerful, provocative Knot

To call Gidion's Knot, Johnna Adams' play now at the Aurora Theatre Company, a mystery is accurate but only to a point. Certainly there are things we don't know and need to find out, but there's a whole lot more to this complex, disturbing and even devastating drama.

Looking at Nina Ball's incredibly realistic fifth-grade classroom set – complete with tiled ceiling and fluorescent lights – it's easy to think, "A play about a parent-teacher conference in a bright, friendly classroom. How intense could this be?" Oh, it's intense all right.