When a cold case team reopens a murder investigation at a private boarding school, they uncover a web of secrets and trauma that have haunted the community for years.

When a message in a bottle is discovered in Denmark, it leads to a cold case investigation involving a missing child and religious fundamentalism. A police detective and his partner must unravel the conspiracy to bring justice.

The Marco Effect is a crime thriller movie set in Denmark and the Czech Republic. It revolves around themes of abuse of power, racial and ethnic stereotypes, gangs, and police investigations. The story follows a teenager named Marco who gets caught up in a dangerous criminal world while trying to uncover the truth behind a series of incidents. With the help of a police detective, Marco navigates through a complex web of corruption and violence.

In 1961 Denmark, a traumatized woman's body is found in a hidden room. Detective Carl Mørck and his team from Afdeling Q reopen the cold case, leading them to uncover a conspiracy involving murders, sexual abuse, and police corruption. As they dig deeper into the investigation, they face threats and obstacles that put their lives at risk.

In a moment of cowardice, Detective Carl Mørck sends Rose, his junior colleague in Department Q, to the remote Danish island of Bornholm to answer his old colleague Christian Habersaat's repeated requests. But during his forced retirement ceremony Christian kills himself sending Rose into a journey deep into her own traumatic past. Later, Department Q are embroiled into an old cold case of a girl found dead hanging in a tree.

Detective Carl Mørck investigates the disappearance of a female politician, leading him into a cold case investigation filled with mystery and danger.