Read Killer Pietro manhwa in English where retired veterans face betrayal from dangerous syndicates. Former legendary assassin Peter survives a brutal ambush by his old organization, Glory Club. A mysterious magical event suddenly reverts his aging body back to its teenage years. Now possessing his peak youthful physique, he targets the corrupt syndicate leaders. Peter navigates a ruthless criminal underworld while uncovering a massive hidden conspiracy. Dark enemies hunt him down across the city to eliminate the evidence. Peter is executing his revenge plan while tracking down his former executioners.