Watch The Dark Heart Season HD Full Free on solarmovie.do. Watch The Dark Heart tv series online free. Follows Tanja, an investigator with Missing People Sweden, as she tries to solve the case of a rich ...Follows Tanja, an investigator with Missing People Sweden, as she tries to solve the case of a rich landowner who disappears after giving her daughter an ultimatum - end her relationship with the son of a farmer, or lose her inheritance.