A knight on a golden horse. Jones D.U.

Polly forgot, forgot everything.... Five long and amazing years of friendship with Tom, their correspondence, stories that they composed together and which for some reason turned out to be true, dizzying adventures, meetings and separation, joy and resentment, the threats of his relatives prohibited them to communicate... and how she She agreed to forget him. But the strangest thing - everyone around them forgot about it. It was as if someone had erased everything that was in the life of Polly, and replaced the memories of a boring fake. Even the book that Tom gave her mysteriously transformed: some stories disappeared, others were rewritten. And only the picture with the flaming flowers of the Bologolov helped her to remember the past and understand who and why deprived her of memory.

and it all started with the fact that one day in Halloween Polly, violating the strict grandmother's ban, made it into an old mansion neighborhood...