The series is based on the manga of the same name by Takashi Mibe. The protagonist Fujinuma Satoru has a special ability. If someone dies near him, time will flow back to the moment when the cause of the accident occurred. Satoru must find it and change it to save the victim; otherwise, time will continue to flow back until the cause is found. It is worth mentioning that the series was mainly filmed in Hokkaido, Japan, and the famous local snow scenery and the night view of Mount Hakodate are shown in the series.