A fictional look at the real-life infiltration of the Green movement by police officers who engaged in longterm relationships with protestors. Samhain is a young, angry and bewildered squatter living in an abandoned hotel in the North of England. One day he receives a message, his father, a man he never knew, was an undercover policeman infiltrating the Green movement of the 80s. What's more, he finds out that he too is now a father. As Sam leaves for Europe, he pursues freedom and flees from his responsibilities. Responsibility, however, is hard to escape. Guest is a story of disillusionment, protest and, eventually, redemption.