In 1945, Polish intelligence agent Hans Kloss, codenamed J-23, goes to Konigsberg to search for the treasure stolen by the Nazis. It's there that he meets his old friend and rival, SS Officer Hermann Brunner.
Kazmierz Dziewanowicz's hobby is very strange. He collect people who was born on 29 of February. One day he see that in his colection there are two men with the same name, the same birth ...
On the Koszalin coast, secret agent Bernard is about to land information on the deployment of Polish missile bases.