A blank space with missing pieces
a modern AU story set in Grand Line City which is practically a lawless city infested by several gangs(the cannon crews duh) and disappearances are common, but things change when missing people start turning up dead in different corners of the city . Law is a surgeon struggling to maintain a peaceful life.
He spectacularly fails at this when he unexpectedly wakes up next to the corpse of one of the missing and is immediately found at the crime scene. Fortunately, it is not by a civilian or a police officer, but by the leader of an emerging gang that has been causing great chaos in the city: Mugiwara no Luffy.
Law is taken in by the Straw Hats, who are looking for Luffy's brother. Portgas D Ace is just another face in the news, one of the countless people missing. In the end, Law has little (or no) option but to join Luffy in the search for the real killer in order to clear his name and, hopefully, save Luffy's brother before he becomes another corpse.
Everything goes off the rails even further when a serial killer calling himself the "Surgeon of Death" emerges and Law's DNA is found on victims who are found dismembered and grotesquely reassembled, with their hearts and lungs missing. Now not only the gangs suspect his involvement in the crimes but also the police and the public, especially when they discover that thirteen years ago he was rescued from the infamous Donquixote gang.