Watch Rain for Free: How to Stream the Movie Online at 123Movies. . The film follows 12-year-old Ats, whose older brother Rain unexpectedly returns to the family home in a small seaside town to face their authoritarian father Kalju and their mother, a woman on the verge of losing love. Ats is a witness to the clash between his father and brother, two stubborn men from different generations with radically different views of the world.