By: Addison Wylie Shut In’s leading damsel Anna (played by Beth Riesgraf) and filmmaker Adam Schindler have something in common: both have the ability to surprise and disarm. Schindler’s thriller begins as one of Toronto After Dark’s tamer offerings, and then socks us upside the head with brutal consequences and intense confrontations.  Anna is reserved in mourning, and her agoraphobia keeps her hushed inside a rickety house.  When she’s threatened by thieves interested in her stashed wealth, Anna reveals…