Dragon's Vault

Hacker Lily breaks into billionaire Orion’s underground vault and discovers a black dragon imprisoned there, its heart ripped out. The replacement energy core has only seventy-two hours left. Forced to work together, Lily and Orion fight through a tech tycoon’s defenses to destroy a weapons program fueled by dragon blood. When the dragon heart finally fades, Orion must face a new life as a mortal—with Lily at his side.