Seraphina Sinclair thought the hardest part of life was building the future she'd fought for. She was wrong. After falling into an abandoned well while rescuing a stray cat, Seraphina awakens in the Hybrid Realms, a hidden world ruled by immortal animal-human clans where humans are forbidden to exist. Captured upon arrival, she's brought before Aric, the High Talon of the Eagle Clan. The moment he sees her, everything changes. She has the face of Astraea, the mate he buried centuries ago. By law, Seraphina should be executed. Instead, Aric defies his own people and claims her under his protection, igniting suspicion among rival clans and unrest within his own. Desperate to return home, Seraphina refuses to become a substitute for a dead woman. But the longer she remains in the Hybrid Realms, the more tangled her fate becomes with the immortal warrior who cannot decide whether she's a cruel echo of his past... or the future he never believed he could have. As ancient enemies gather and war threatens every clan, Seraphina must choose between the life she left behind and a world that was never meant to let her go.