Brizan is in a state of high alert. The cloud caused a tidal wave that destroyed the lighthouse, and the small town is now split in half by the water. Lena sees strange coincidences with her own dream. While the locals start to panic, Faust Ketchak sees in this phenomenon a revolt of Nature, a punishment against humanity's destructive behaviour. Meanwhile, Lena and Ben uncover significant pollution on the Brizan site run by Julien. Sick with worry, Lena suffers from a mysterious illness.