Ayla thought her life was just as ordinary as the dusty books she sold. But everything changes on a rainy Tuesday when she finds a mysterious silver key carved with an ancient wolf crest hidden inside a century-old book.Before she can find out what it opens, a dangerous yet breathtakingly handsome billionaire, Ethan, enters her life. He wants the key at any cost. As secrets unravel and a forbidden romance sparks, Ayla realizes that the key doesn't just unlock a hidden door—it unlocks a dangerous world she never knew existed. Will she survive the truth behind the wolf?