There’s no faulting the cast, with U.S. comedy vet Judy Greer and newcomer Daniel Doheney as an uncomfortably tight mother-and-son unit.

But the premise here is so flimsy and forced, it’s surprising that anyone makes it to the finish line. Basically, the home-schooled science wiz flubs the SATs taken at a local high school when he spies a mysterious one-legged girl (England’s appealing Siobhan Williams, also good). But the film’s rapid-fire sitcom lines mostly fall flat and anyway don’t sit well with an essentially static story that can’t quite determine how it even feels about the quasi-incestuous weirdness at its centre. Fail!