When newly widowed Tess returns to Merrick Court, her husband's home, it's to confront her past head-on. But during a visit to the nearby Raglan Castle, an extraordinary hallucination transports her to a past that existed long before her own - to 17th-century Wales and to a castle on the brink of a siege. Even when Tess leaves Raglan, the strangeness continues as her life becomes increasingly intertwined with her dreams and visions. And when she meets Josh Owens, a stranger from New Zealand, the parallels become even more obvious. But perhaps the voices from the past are simply trying to tell their own story or is it something more.