Returning home on a trolleybus, Tatyana Ivanova accidentally discovered the body of an unknown man in the passenger compartment, in whose pocket she found her business card with the inscription “Refused” in pencil. It was not immediately possible to remember whether someone had recently called her with a request to investigate a matter and what she had refused him. But still, Tatyana remembered that recently there was a call from a man who asked to follow his fiancee, who, apparently, was cheating on him. Now for Tatyana it’s a matter of principle to find out what exactly happened to this failed client of hers...