The House We Inherit

In a small town in America, the Wrights reside. Timothy Wright lives alone in his childhood home after taking it over from his deceased parents—and due to an innate heart defect he only has a couple of months left to live.
After Timmy falls down the stairs and breaks his leg, his adoptive brother, Kevin, and their older sister, Helena, all find themselves reunited in their childhood home. But why are Kevin and Helena not talking? And why does she have an incessant need to clean the house?