After May receives a telegram from her old detective colleague Ryan Keller, she and Benedict are dropped off at his luxurious mansion. However, they are informed that Keller did not send any telegrams whatsoever.

 

They end up spending a frightening night in Keller's mansion, which is made worse by the fact that Keller is a scheming, cackling creep who took credit for many cases that May solved.

 

When one of Keller's staff members is murdered, May and Benedict are called on to help solve the case.