Blast From The Past

Arriving in a small Irish town, a sinister stranger finds himself caught in a time warp. 2016 has become 1976 and Farrell has become a ghost. Is this just a crazy dream, or is he really dead and taking the first steps in his afterlife? If he really is a ghost, why can't he pass through closed doors? And why can he only be seen by one little boy, who seems terrified that this spectre intends to harm him?