Enjoying prosperity, SkyClan is unaware of a lurking stranger who could put Leafstar's newborn kits in danger.

When polar bear cub Kallik and her brother Taqqiq wander away from their mother, they discover startling new things about life in the wild, and make a new friend, whose life may be in danger.

"As a leaderless RiverClan faces disaster, its warriors and its young medicine cat apprentice are determined to protect their Clan and find its new leader--even if it means lying to the other Clans"--

"Friends and family are split as longtime allies turn on each other, and born foes form unlikely bonds. The very threat that led Bramble to leave the place he called home has ensnared the creatures who live on the mountain. As the mysterious poison begins to affect more and more animals, Chase struggles to determine where her loyalties should lie. And down on the plains, Prance prays that the Great Spirit will send Thorn a solution to the shadowy...

"In a leaderless RiverClan, medicine cat apprentice Frostpaw is desperate to guide her Clanmates down the right path--while Tigerstar watches their every move. Within ShadowClan and ThunderClan, the changes to the warrior code stretch tempers to the tipping point, where one wrong move could prove that peace among the Clans can never last for long."--

Despite their misgivings about the many dangers that lie ahead, the bears venture out onto the Everlasting Ice and learn of their final destination with the help of a mystical bear spirit.