The Gatekeeper is a story of an old man, who is in charge of an isolated rail crossing in the city outskirt. Accepting the alienation, he tries to find tiny little moments to keep himself engaged in this uninterrupted land. The film unfolds a day in his regular life when loneliness makes him hallucinate about his childhood, in the interim period of two trains. But eventually his imagination breaks like a house of cards and reality prevails when the last train arrives.