A night watchman of the Antwerp port is shot to death. His boss Herman Arco tells Tom and Fien that his daughter Stephanie and her fiancé live in the neighborhood. However, the couple declares to have heard nothing. When Tom and Fien catch longshoreman Ruud Deckers taking a load of cocaine outside a container, they think they have solved the case. But after taking the man in custody, a second murder takes place.