Source To Sea is a film made by scientists to scientists about Finnish freshwater research. The story begins with snow, and the researchers trying to find out with isotopes where the snow comes from and where does it go: Into the rivers. We follow the scientists working on the hydrology and geomorphology of rivers all the way to the coast of Baltic Sea, where the geologists are studying the sediments carried into the sea by the rivers of Finland. On the focus is the climate change, and how will it change the water cycle in Finland, if the rivers and the sea will not freeze in the future, and if the snow will turn to water.

The film contains field research imagery and scientist interviews, filmed during three research projects, Digital Waters Flagship (Funded by research Council of Finland), Green-Digi-Basin and HYDRO-RI Platform (Funded by European Union-NextGenerationEU), between 2022-2024, aiming to make a digital twin of the Finnish river basins, while also educating the next generation of water scientists specialized in boreal and sub-arctic water resources.