They have always lived by the code, but only change can keep the peace. A new age is dawning on the warrior Clans. Now a new generation of warriors rises, one wrestling with the legacy of his great ancestor Firestar, one seeking to protect her troubled Clan, and one yearning to prove herself as a medicine cat, as leaders from all five Clans agree that the Warrior Code must be reformed. But when tragedy strikes RiverClan, old fears will threaten the...

"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"--

"The warrior code now allows a cat to formally change Clans, but ShadowClan's newest arrival feels increasingly unwelcome--and though ShadowClan warrior Sunbeam thinks every cat deserves a chance, one of the loudest voices of opposition is her own mother. Meanwhile medicine cat apprentice Frostpaw scrambles to help RiverClan stay afloat under the watchful eye of a second Tigerstar, and the shadow of growing conflict looms over them all..."--

While Frostpaw takes refuge in ShadowClan as Splashtail seizes control of her home, Nightheart returns to ThunderClan and to a complicated reunion with his mate Sunbeam whose efforts to fit in as ThunderClan's newest member are hampered by her treacherous mother.