The horror flick “13 Sins” is passable enough when it comes to dialing up the suspense, but the “Saw” formula of a mysterious voice guiding our hero through a series of depravities has gone a bit stale.
Mark Webber plays a loser with a mentally challenged brother, a cantankerous dad and a lot of debt who gets a call ordering him to kill a fly, then eat it. Each time he completes a task, his bank account is enriched, but he’s told that he forfeits the gains that promise to change his life if he doesn’t complete each of 13 increasingly grisly tasks.
Based on a 2006 Thai film, “13 Sins” has an improv-comedy style that’s often breezy fun, but it grows increasingly farfetched as it goes, and the characters are so thinly developed that the final twist doesn’t have much impact.