Grace is a religious woman who lives in an old house kept dark because her two children, Anne and Nicholas, have a rare sensitivity to light. When the family begins to suspect the house is haunted, Grace fights to protect her children at any cost in the face of strange events and disturbing visions.

The true story of parents who discover that their two young daughters have a genetic disease that makes it fatal for them to be exposed to ordinary light.

Traveling in search of a cure for a rare skin disease, a man finds freedom and love along the way.