Lena Grant sat at her desk, sipping her coffee and staring blankly at the computer screen in front of her. As a renowned art critic, she had spent her career studying the masterpieces of the world's greatest artists. But today, she was struggling to focus. Her mind kept wandering back to the strange message she had received the night before. It had come from an unknown number, and all it had said was: "Meet me at the old warehouse on 5th and Main at midnight. Come alone." Lena had tried to brush it off as a prank, but she couldn't shake the feeling that something was off.