Sargasso

As a child, Hannah lived at Sargasso, the isolated beachside home designed by her father, a brilliant architect. A lonely, introverted child, she wanted no company but that of Flint, the enigmatic boy who no one else ever saw ... and who promised he would always look after her.

Hannah's idyllic childhood at Sargasso ended in tragedy, but now as an adult she is back to renovate the house, which she has inherited from her grandmother. Her boyfriend Tristan visits regularly but then, amid a series of uncanny incidents, Flint reappears ... and as his possessiveness grows, Hannah's hold on the world begins to lapse. What is real and what is imaginary, or from beyond the grave?