The season continues the stories of the survivors of the crash of the fictional Oceanic Airlines Flight 815, after some of them are rescued and those still stranded seemingly disappear to an unknown location and time with the island that they inhabit.
The season builds upon the previous one, exploring the fates of the survivors of Oceanic Airlines Flight 815 who were rescued, while those still stranded appear to have vanished from our reality, leaving behind only their connection to the enigmatic island that seems to be a separate realm.