Two sisters, Kate & Rachel, travel
to a remote Scottish island with their boyfriends, Russell
and Sean. Kate and Russell have been together for years, whereas
Rachel, the younger of the two, has been seeing Sean for only
a few weeks.
The island is beautiful and barren. There are no roads or
cards, just a lone house. The first night the two couples
stay in the house, Sean and Kate find themselves along together.
He seduces her and they make love.
Sean wants to carry on their affair, but Kate rejects his
ongoing advances. She wants to conceal their betrayal from
Rachel and Russell. As Kate tries to resist him, Sean becomes
increasingly disturbed and possessive. Rachel confides in
Kate, trying to understand what has changed Sean, but Kate
is unable to answer. She cannot bring herself to reveal the
truth to Rachel or Russell.
As Sean becomes more persistent and violent he begins to turn
his aggression toward Russell, who decides they must leave
the island. Sean, however, has different plans...
