Denmark, 2016.A vague note was found in a glass bottle that had been baptized by the ocean and had been baptized by years.After difficult deciphering, the secret words hidden between the lines gradually surfaced, leading to an old case that was covered with dust eight years ago.Members of the Q department followed this dark and confusing clue to investigate in depth, while a new tragedy was quietly taking place, challenging their belief in justice and their deepest beliefs in heart.