New Port City, 2029. Major Motoko Kusanagi, a cyborg security officer whose body is entirely artificial, hunts an elusive hacker known as the Puppet Master — an entity that ghost-hacks human minds and rewrites their memories. But the closer she gets, the more the case turns inward: if her body is manufactured and her memories can be edited, what exactly is the 'ghost' in her shell that makes her her?