Mercenary Kate Daniels and her mate, Curran, the Beast Lord, are struggling to solve a heartbreaking crisis. Unable to control their beasts, many of the Pack’s shapeshifting children fail to survive to adulthood. While there is a medicine that can help, the secret to its making is closely guarded by the European packs, and there’s little available in Atlanta. Kate can’t bear to watch innocents suffer, but the solution she and Curran have found threatens to be even more painful. The European shapeshifters who once outmaneuvered the Beast Lord have asked him to arbitrate a dispute—and they’ll pay him in medicine. With the young people’s survival and the Pack’s future at stake, Kate and Curran know they must accept the offer—but they have little doubt that they’re heading straight into a trap…

傭兵凱特‧丹尼爾和她的伴侶獸王克倫正在為一件令人悲痛的危機苦惱著。由於他們控制不了手下的野獸，派克那些變形孩童有許多都因此夭折。雖然不是無法可治，但製藥秘方遠在歐洲，而且被嚴密保管，因此在亞特蘭大的他們幾乎無法取得。凱特不忍見無辜人受苦，但她和克倫所找到的解決方法似乎將使患者更為痛苦。另一方面，曾經用計擊敗獸王的歐洲變形人藉機要求獸王來仲裁糾紛，並答應以解藥作為回報。面對孩童的生死和派克的未來，凱特和克倫知道，對方的提出來的條件，他們不得不接受，但是他們卻絲毫不知自己正一步步踏進陷阱……