Now that Kallik and Yakone have decided to join Toklo and Lusa on the rest of their journey home, the four bears head toward warmer territories. Spring is coming, and Toklo and Lusa are overjoyed to be away from the ice, surrounded by green forests and flowing rivers once again.

But the forest brings unique challenges for the polar bears, Kallik and Yakone. As they struggle to continue on, they know that each step is taking them farther from the ice. Have they made a mistake, straying from their natural home?

Soon Toklo also grows desperate to leave the struggles of their journey behind. As the group pushes toward the mountains where brown bears roam, Toklo must decide whether to see the quest through to the end . . . or to start a new life on his own.