When Sloane Drake learns her best friend Leigh has gone missing in Boston, she expects the worst. She and the rest of the ex-assassins go after Leigh to discover her whereabouts. No one's seen her, not even Axel Whitman, the arrogant rich boy who used to be Leigh's best friend. Sloane has always stuck to the shadows. She's not flashy, she doesn't take charge, and no one notices her. But when everyone else disappears as well, she's left on...