The Master had been lost recently, the Rani having been taken away. He'd managed to get a flat, he was always quite good at making people do what he needed them to, but without her he found himself not being able to contain himself. Each minute of each day the drums were beginning to get louder and louder. He couldn't handle it, he had spent so long without them it was driving him to even more insanity than before.
The park was dark, he found he prefered it then. No one would be out, he could deal with his thoughts, could try to calm himself down. Having spent so long without the drums he really did not want them back. He had hoped that even with Ushas gone he could keep the beat away but that seemed impossible.
Looking out, he swore he saw someone he thought was long gone. His lips lifted into a smirk as he walked closer. The Doctor was clearly more focused with whatever was in front of him he managed to get close enough without the Doctor seeing him.