A young man, taking the metro to his place of work, suddenly realizes with horror that by some miracle he ended up on a different line. Moreover, time inexplicably “jumped” forward half an hour! He was hopelessly late for work, but whatever work there was - the young man was simply in shock, because he could not possibly have made a mistake! What is this – a manifestation of someone’s evil will or some kind of grandiose experiment in which he became an involuntary participant?..