What are bears for?

Guillermo is an internationally-renowned Spanish biologist investigating climate change in Antarctica. Alejandro is a zoologist with less prestige looking for bears in the woods of Asturias (Spain). Science isn´t going very well for either of them: Guillermo finds a plant sprouting through the ice. Alejandro can´t find any bears in Asturias. They have something else in common: they´re brothers. Their paths separated a long time ago, since their personalities clash as much as their scientific methods.