Polish history is full of unexplained catastrophes. Though many people have lost their lives, their causes have never been fully established. The Discovery Channel will take a close look at these tragic events, finding new evidence, witnesses, and the latest expert opinions. All this to check the origins of the "greatest Polish catastrophes" and whether they could have been prevented.

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On January 13, 1993, the ferry MF Jan Heweliusz left Świnoujście for another voyage to the Swedish city of Ystad. There were sixty-four people on board. Due to a failure of the stern door, the ferry had a delay which the crew tried to make up for. Unfortunately, an unusually strong storm broke out in the Baltic Sea at night. As a result, Heweliusz sank, and only a few people were saved from the entire crew. Passengers died in the icy waves of the sea.
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On January 13, 1993, the ferry MF Jan Heweliusz left Świnoujście for another voyage to the Swedish city of Ystad. There were sixty-four people on board. Due to a failure of the stern door, the ferry had a delay which the crew tried to make up for. Unfortunately, an unusually strong storm broke out in the Baltic Sea at night. As a result, Heweliusz sank, and only a few people were saved from the entire crew. Passengers died in the icy waves of the sea.