A late-night phone call disrupts the peaceful life of Australian Chinese employee Ma Ke (Lei Jiayin). His ex-girlfriend Zhou Wen (Tang Wei), who had disappeared for many years, suddenly appears, and a mysterious killer follows. Faced with layers of pursuit, Ma Ke takes Zhou Wen to Africa to find the truth. He gradually realizes that there is another conspiracy behind the cross-border transaction he is in charge of. Should he be a "whistleblower" to announce the truth to the society? Or turn a blind eye and protect himself? Ma Ke has to face a dilemma. At the same time, Ma Ke discovers that Zhou Wen, who he thought was "in the same boat" as him, is by no means as "simple" as she seems. The truth is buried deeper and deeper, and a greater crisis is approaching...