In the mid-1800s, Caroline Marshall was forced to accept the marriage proposal of an attorney from a neighboring town. However, Caroline was in love with Thomas Cooper, the caretaker of the Bettencourt Estate Lighthouse and an orphan whom the family had taken in several years prior. At seventeen, Caroline took her own life by leaping from the top of the lighthouse. Upon learning what she had done, Thomas did the same.

Following the tragedy, the lighthouse was locked and never used again. In the years since the lovers suicides, people in the small town of Bettencourt, Virginia, watch as the abandoned lighthouse glows every year on the anniversary of Carolines death. The estate is rumored to be the most haunted place in town, riddled with tragedy for anyone who tries to live there.

In 1996, fifteen-year-old Caroline Douglas, named after the legendary ghost, visits the estate that has been in her mothers family for generations. Shes not there long before strange things begin to happen. With help from her family and her best friend, Bo, will Caroline be able to solve the mystery surrounding the haunting of her inherited home before its too late?