Juliana Smithton is a neurologist whose research leads to a potential breakthrough in Alzheimer treatment drugs. Just as it does, her life takes a disorienting turn. During a lecture to colleagues at an exclusive beach resort, she glimpses an enigmatic young woman in a yellow bikini amidst the crowd of business suits. One step at a time, a mystery unravels as contradictory evidence, blurred truth and fragmented memories collide in a cottage on the windswept shores of Cape Cod.