Nico Nightshade comes to Blackthorn Valley for college after inheriting his grandfather’s house and tuition. He expects a quiet fresh start. Then he locks the iron deadbolt on the old Nightshade house—and a pressure he has felt his entire life suddenly disappears. Blackthorn was built by five founding families, their bloodlines bound together for generations. Four heirs have grown up knowing the truth. Nico is the missing fifth. Iron answers to his hands. Stone, heat, earth, and fluid answer to the others. His return awakens an old tether between them, carrying power, pain, instinct, and even heartbeats across the connection. As Nico grows closer to Maya Hazel and Elena Argent, the line between magic and emotion becomes harder to separate. But something beneath Blackthorn has been feeding on the valley’s magic for twenty years. The fifth heir is home. And the gate is starting to open.