The city glittered far below, a million points of light against the night sky, but inside Chloe's penthouse, everything felt strangely still. She sat curled up on the wide, pale-grey sofa, one arm wrapped around her knees, the other absently swirling the stem of a wine glass she hadn't even sipped from. Her mind was racing as she contemplated something significant.

Then she heard it.

A faint scuff like a shoe dragging over marble, echoed from the hallway leading to her bedroom.

She froze, every ...