Laura (Seidi Haarla) escapes from a recent breakup on the train from Moscow to Murmansk in the late 90's. She is joined in the compartment by the miner Ljoha (Yuriy Borisov). Laura's hope for a calm train journey that will help her find herself, comes to an abrupt end when Ljoha already the first night drinks himself talkative and full. After the first conflict-filled meeting, the unequal couple begins to find an unexpected tone. Their casual encounter on a crowded train is characterized by a warm humor that makes both passengers look at themselves with new eyes.

The film is based on Rosa Liksom's award-winning novel and is a warm and humorous road movie.

Juho Kuosmanen (b. 1979) is a Finnish filmmaker and screenwriter. He graduated from the Aalto University School of Arts, Design and Architecture in 2014 with the graduation film The Painting Sellers (2010). Compartment Number 6 is Kuosmanen's second feature film after the debut film The Happiest Day in the Life of Olli Mäki (2016).