Neryn has made a long journey to perfect her skills as a Caller. She has learned the wisdom of water and of earth; she has journeyed to the remote isles of the west and the forbidding mountains of the north. Now, Neryn must travel in Alban's freezing winter to seek the mysterious White Lady, Guardian of Air. For only when Neryn has been trained by all four Guardians will she be ready to play her role in toppling the tyrannical King Keldec. But the White Lady is not what she seems. Trapped with Whisper, her fey protector, Neryn is unable to send word to her beloved Flint, who is in danger of being exposed as a double agent. When a new threat looms and the rebellion is in jeopardy, Neryn must enter Keldec's court, where one false move could see her culled. She must stand up against forces more powerful than any she has confronted before, and face losses that could break her heart.