Back at the Annual Christmas Benefit Auction at the Hammer. This time, the story centers around Kein, a sub whose Master/partner up and left him a few years ago. Oliver convinces Kein he needs to participate in the auction. Mac is the lucky winner of this sweet sub and they hit it off right from the start. Turns out Mac is just what Kein needs and Kein is just what Mac has been looking for. This was a really sweet addition to the Hammer series.