Janet is happy to be back in Doveby Dale, under the same roof as her sister, Joan. The arrangement is only temporary, as Janet and her husband, Edward, are planning to move out to the carriage house on the grounds of the bed and breakfast that Joan and Janet own. Still, after several exciting months travelling all over the world on various assignments for a top-secret government agency, Janet is looking forward to some rest and relaxation.The agency has other plans, of course. Now that Janet has shown herself to be a valuable asset to the agency, it's been decided that she needs some formal training. Having spent some weeks learning the basics in London, now that they're in Doveby Dale, the agency has a few training assignments for Janet. They're meant to be simple exercises, designed to test her skills, but the very first one goes badly wrong.Now Janet and Edward have to do whatever they can to try to rescue what's becoming a complicated situation. In the meantime, Janet has two more assignments to get through, and she may not be able to manage them without asking her sister for help.