In the cold snow and ice, the bachelor Russ (Ryan Gosling Ryan Gosling) feels a little lonely and bored. He is a typical otaku with an autistic personality and no friends and companions. His brother Gus (Paul Schneider Paul Schneider) and his sister-in-law (Emily Mortimer Emily Mortimer) live next door. His sister-in-law saw that he stayed at home all day, so she invited him to dinner, but the brother and sister-in-law's inquiries were still of no avail. One day, Russ ordered a blow-up doll Bianca from the toy company and took her to family gatherings, dinner, sleep and church. People around feel that Russ is mentally abnormal, so his brother and sister-in-law specifically consulted the doctor Dagoma (Patricia Clarkson Patricia Clarkson), who believes that Lars's symptoms are an illusion and that the best treatment is to take advantage of the situation. At this time, Russ was so obsessed with Bianca that he even had to marry him in church.