Su Wan, a top agent who was once codenamed "Nightingale", accidentally discovered the dark inside story of the organization during a mission and was hunted around the world. She used her superb disguise and survival ability to approach and "rely on" Gu Lin, who was sent to the Asian battlefield of World War II as a military observer and powerful general, as an orphan who was greedy for money and afraid of death, with the intention of using his power to protect her. Gu Lin, who comes from a warlord family, is a military genius and reform pioneer. He looks cold and ascetic, but in fact he has a strong desire for control. He saw through Su Wan's disguise at a glance, but out of interest and strategic considerations, he signed a "contract marriage" with her and took her under his wing. In fact, he regarded her as the most interesting prey and potentially the most compatible soul. On the battlefield filled with artillery fire, the two tested, exploited, and competed with each other, and then gradually became attracted to each other's abilities and souls, launching an evenly matched love war. With Gu Lin's support, Su Wan gradually realizes her self-worth and fights back against the shadows of the past; while Gu Lin, under the influence of Su Wan, faces a huge impact on his reform ideas and personal emotions. Together, they faced multiple threats from the Japanese army, international forces, the Gu family's internal opposition, and Su Wanyuan's organization (colluding with the underworld and power maniacs), and finally worked together to win the dual victory of war and love.
