Set in the 1970s, Blackwater tells the story of how four random people's lives converge after two tourists are found murdered in a tent near the Swedish mountain town of Blackwater.

While filming a youth gang at a skatepark, Pascal develops a mutual attraction with Joel. Swayed by Joel’s charm, he invites him home under the pretense of "editing film." Once there, however, Pascal begins to question his decision, especially upon realizing that Joel is only seventeen, and his earlier doubts resurface.

Maja (22) lives in Stockholm, Sweden, but a death within the family forces her back to her hometown of Pajala. In Pajala, her sister Sofia lives with the troubadour Johan. After the funeral, Sofia will accompany Johan on a summer tour around Tornedalen, and Maja decides to come along. It will be a journey where questions about their origin and the future of the Tornedal will be put on their head.

Georg is a graphics designer living his best life. But he still can't find meaning. One day, a demented old man shows up in his apartment and becomes a hard break in that lifestyle.