In the second documentary of Worlds of Water Petteri and Antti join fishermen around Finland. On Lake Puruvesi, younger-generation professional fisherman Paavo Pekkinen catches vendace and at Korpilahti Marja Komppa and Ari Seppälä process roach into genuine gourmet products. Teemu Uotila catches European crayfish and at Torne River’s Kukkola rapids they fish for salmon and whitefish by an age-old fishing method, netting, in the summer and in winter, ice-fishers catch delicious burbots. Eels migrating along River Vääksy end up in eel boxes, giving scientists invaluable information about this mysterious fish – and finally, continue to freedom toward the Sargasso Sea 6,000 kilometers away. The documentary also looks at fishing from a fish perspective underwater. What does a vendace seine look like under ice? And how can we show an eel in its own environment?