In the war-torn Shanghai beach, neon lights and gunpowder smoke intertwined, and fate unexpectedly reunited Jiang Shang and Liu Ruyan, who had been separated for twenty years. The childhood sweethearts who were once childhood sweethearts are now a wealthy but unruly businessman who dominates the business world, and the other is a down-and-out young lady who has a poor family and is struggling to survive in troubled times. The estrangement of years and the gap in reality made them full of temptation and suspicion after their reunion, but the deep-seated feelings in their hearts quietly revived in repeated confrontations, and love grew in the cracks of the troubled times. However, the shackles of family marriage ruthlessly separated the two, forcing them to take different life trajectories. When artillery fire tore through the tranquility of the city and their homes were in danger, they put aside their personal grudges and emotional entanglements and became comrades fighting side by side to protect the common country. Amidst the hail of bullets and ruins, they witnessed the good and evil of human nature and the crisis of their home and country, and also re-examined their feelings for each other. Atop the ruins, the flames of war have not yet been extinguished. Can they seize the last warmth in the torrent of troubled times, overcome many obstacles, and make this vicissitudes of love come to fruition?