Basic idea is that instead of turning into a kid, Conan (Shinichi) is killed and returns twenty years later as a mystery solving ghost. Or perhaps is jumped to twenty years into the future.
Shinichi had no idea how long he'd been standing there. It had been near sunset when he'd followed the men in black suits. The long haired one had hit him over the head with something, and made him drink something. That had been...long ago.
Funny, he remembered the park looking much nicer than it did when he and Karin had split up, and he'd gone off after the strangers in black...It almost looked...abandoned.
He wandered the park wondering at the grass that had grown up into cracks in the concrete that had paved it. Only that morning, the place had been neat, and in order. Or had it?
As he wandered, he saw a group of flashlights in the distance. Curious, he approached.
"...Two murders in one day back when our parents were kids." One of the children whom the flashlights belonged to was saying as he approached.
The children shouldn't be there. They were standing almost directly beneath the roller-coaster, the exact same roller-coaster that a man had been beheaded on earlier that day. A park attendant or a security guard should be chasing them off. Where were they?
As he wondered at the absence of the attendants who should be shutting down the rides right about now since it looked to be closing time, a groan came from overhead, and he could see a sizable piece of metal dropping off the coaster straight toward the group below.
The children noticed it and began to scatter. On boy, a small scrawny brunet with glasses didn't look like he would be fast enough.
"Look out!" he screamed as he leapt for the child, hoping to get him out of the way before the metal beam that was tearing its way through the roller-coaster's rotting wooden supports landed.
The next thing he knew was pain...