A bombed bunker on the Baltic coast is the ideal adventure playground for the local children. Wolfgang, however, who is visiting from Berlin, is more interested in the nearshore wreck. During a nighttime boat trip there, the children discover traces that point to other people visiting the wreck. As they try to get to the bottom of the matter, they fall into the hands of gangsters who use the wreck to smuggle explosives into the GDR. During an operation by the police, who have been on the smugglers trail for some time, the situation becomes perilous for the trapped boys.
A bombed bunker on the Baltic coast is the ideal adventure playground for the local children. Wolfgang, however, who is visiting from Berlin, is more interested in the nearshore wreck.
During a nighttime boat trip there, the children discover traces that point to other people visiting the wreck. As they try to get to the bottom of the matter, they fall into the hands of gangsters who use the wreck to smuggle explosives into the GDR.
During an operation by the police, who have been on the smugglers trail for some time, the situation becomes perilous for the trapped boys.