Cast through time with his fellow Dragon Legion Warriors, Orion follows the spark of his firestorm, the sign of his destined mate's presence. Only when he's left behind, alone in a different time, does he discover the darkfire's deception. His firestorm might be a feint, but the woman touched by its golden radiance is one who could capture Orion's heart forever. When Slayers attack, Orion is determined to defend her and her secrets, no matter the price to himself. Grad student Francesca is more interested in her career and research than in getting married. But then, she's never met a man like Orion, a fierce protector whose presence ignites an undeniable desire within her-although the seductive power of his kiss isn't the only thing Francesca can't explain. Orion also creates a glow inside the vase said to contain the voice of the Cumaean Sibyl. When that light is released, Francesca hears the voice of the past and is revealed as Orion's destined mate-making her the Slayers' target. On the run, Orion and Francesca join forces to solve the Sibyl's last riddle. Will success provide the key to their shared future? Or will the unpredictable darkfire snatch Orion away as abruptly as he arrived-along with Francesca's memories of the dragon shifter who has claimed her heart? How much will either of them sacrifice to save their their unborn son and defend their future together?