At the edge of the Endless Ice, the four bears Ujurak, Toklo, Lusa, and Kallik reach Star Island, where a large group of bears is in trouble but believes Lusa is destined to help bring back the favor of the spirits.
"The four bears are determined to reach Great Bear Lake before the longest day gathering, but when Lusa is separated from the others, she faces difficult questions about her future"--
"The four bears have reached the mountains where Toklo spent his cubhood--but they soon discover that the home Toklo has returned to is nothing like the one he remembered"--
As the three bears, Toklo, Lusa, and Kallik, begin their journey home, they encounter new friends and dangerous enemies and must decide which they can trust to help them on their quest.
As the four bears head toward warmer territories, polar bears Kallik and Yakone wonder if they've made a mistake leaving their natural home, while Toklo, desperate to leave the struggles of their journey behind, thinks about leaving the group and starting a new life on his own.