Apparently someone is intending to do away with Isobel Wren. She has been left tied on her sofa, gagged up nice and tight, and left alone with a time bomb. The good news for Isobel, if you could call it that, is that she's not tied to the sofa and she can move a bit. Getting out of the way of the bomb is not going to work, but if she can just stop the timer with her toes....