The evil Outworld emperor Shao Kahn opens a portal to Earthrealm (Earth) and has resurrected his queen Sindel, Princess Kitana's long-deceased mother. Earthrealm is therefore in danger of being absorbed into Outworld within six days, a fate which reigning Mortal Kombat champion Liu Kang and the other Earthrealm heroes must fight to prevent. When Kahn kills Johnny Cage during a confrontation with the thunder god and Earthrealm protector Raiden (Mortal Kombat), he and the remaining Earthrealm warriors must regroup and find a way to defeat Shao Kahn.