The Battlefield 4 gameplay reveal trailer features footage from the prologue mission "Fishing in Baku", where Tombstone Squad, carrying intelligence from a defecting Russian general, escapes from Baku, Azerbaijan with Russian spec op forces in hot pursuit. Afterwards, Tombstone squad is sent on a covert mission to Shanghai, to rescue a group of VIP´s, Kovic among them. In the most recently revealed mission, "Angry Sea" (怒海狂涛 Nù hǎi kuángtāo), Tombstone Squad tries to escape from a sinking aircraft carrier en route to Singapore with more intel, while fighting off Chinese forces. The campaign's main plot involves the US's implication in the assassination of China´s future leader and voice of peace, Jin Jié, and the threat of World War 3 between The U.S., China, and Russia.