Research scientist Shea Caldwell has always had a thing for security consultant, Derek Oneiros. He's smart, handsome, and built like a Greek god. As attracted as she is to him, though, she's afraid to let him into her bed – because she's dangerous when she sleeps.Derek is known among his brothers as "The Machine," yet his carefully cultivated control is put to the test whenever he's around Shea. The woman is as beautiful as she is intelligent, but they've always kept things professional – until Derek learns why. Shea is sleepwalking again, but what she doesn't know is that he may be the only one who can help her. For he is a Greek daemon, and he's charged with protecting her dreams.With Shea threatened, Derek makes things personal, and their nights together turn steamy and intimate. He's ready to battle against the Somnambulist that's been controlling his lover in her sleep, yet is the night creature really causing all the harm? When Shea's groundbreaking research notes are stolen, it's clear that other evil forces may be at work.