A detective chief inspector from the year 2006 is in the midst of probing a serial murder case when he is hit by a fast-moving vehicle. Upon regaining consciousness, he is bewildered to discover that he has inexplicably been sent back to the year 1973. At first, he grapples with accepting his new reality, having to adapt to the outdated technology and mindset of that era, all while trying to unravel the mystery of how he ended up stuck in the past.