Anyone diving in Finland is often presented with questions. Is there anything to see in the murky waters? Granted, the diving conditions in Finland are quite different from the clear and warm southern waters with magnificent corals. It’s harder to find underwater beauty in the north. The effort is rewarded with underwater views you didn’t think existed. In the documentary Petteri examines underwater life in lakes, rivers, spring ponds and the sea. On his journey to underwater worlds he is joined by underwater photographer Tiiu Tamm on Lake Valkiajärvi in Kitee, famous for its clear water, and by spear fisher Kim Jaatinen in the rockweed jungles of the Archipelago Sea. River Karvia is the scene for a dive into the fascinating life of freshwater pearl mussels. The documentarist’s long-time diving partner Sari Orkomies often joins him under the surface. Son Antti also comes on dives, where father passes on his knowhow on underwater photography to the son.