No known grave

Summer 1942. DI Tom Tyler is making a fresh start in Ludlow, Shropshire. On the outskirts of town, St. Anne's Convalescent Hospital has been established in an old manor house to help victims of the war to recover. After a horrifying double murder is discovered on the grounds, Tyler must figure out how the crime could have occurred in such a secluded and presumably impenetrable place, where most of the patients are unable to walk or are blind, or both.