A Promise in My Heart

A family that runs a pawnshop has a few skeletons in the closet.

The first Mandarin-language sitcom.

A popular college student, by chance, gets involved with a drug trafficker's daughter, who falls head over heels for him. He, on the other hand, ends up going undercover to expose her father's illegal drug business after he falls madly in love with a beautiful policewoman.

Fang Yan and Du Mei experience a profound and unforgettable love, just like any other couple, through a series of quarrels, breakups, and reconciliations. Initially, their relationship is rocky. First, Du Mei misunderstands that Fang Yan already has a girlfriend, and later, she subtly hints that she is attending a dance, indirectly inviting Fang Yan to be her partner. However, more misunderstandings follow, leading to a stalemate in their relationship.

After ten years of knowledge and choice, after the victory of the War of Resistance Against Japan, Lin Nansheng has grown into a true Communist Party member. And at the critical moment of the War of Liberation, he made outstanding contributions to the party and the country.

During the 2nd Sino-Japanese War, orphan Lu Feng returns to Shanghai as a Communist undercover agent, tasked with infiltrating No. 76 Headquarters. There, he crosses paths with the mysterious Hua Xiang Yu and his childhood friend Huo Fei, both hiding secrets of their own. As they circle each other in a dangerous game of loyalty and deception, these hidden agents must decide what they truly stand for, risking everything to fight for a better future.

Before the breakout of the Sino-Japanese War, Hong, Wang, and Peng were best friends. Hong and Wang secretly joined the local guerrillas after the Japanese began invading China. Hong ran a small business and Wang worked as a courier for a Japanese trading firm, hiding their true identities in order to collect intelligence on the Japanese for the Eight Route Army, and established a railway guerrilla unit. Wang soon found out that the trading firm he was working for was indeed an intelligence unit of the Japanese. They infiltrated the Japanese special forces and eliminated many Japanese. Suspicions arise from the Japanese as to the real identity of the individuals suspected of being part of the railway guerrilla forces, so called Flying Tigers unit, so the Japanese began to form a counter-spying operation and other under-handed means by recruiting Chinese traitors to uncover and eliminate them all.

In 1943 Shanghai, an explosion leads to a showdown between Communist undercover agent Lu Zhengyang and former police officer Lin Shaobai. Six years later, Lu Zhengyang, now a key member of the Shanghai Public Security Bureau, recruits Lin Shaobai, the "Shanghai Expert," to tackle major cases and thwart the plots of veteran spy Zheng Lanting. As they work together, Lu Zhengyang and Lin Shaobai build trust and become close comrades.

When Huiying hears that her mother's dying wish is to be buried next to her husband, she discovers that his remains are in the countryside and cared for by his first wife. A conflict ensues, and Huiying's daughter, an intrepid reporter, breaks the story as the three women search for proof of love.

After a series of assassinations in Nanking, a Japanese spy master gathers a group of suspects in a mansion, then a tense cat-and-mouse game erupts as the Chinese agent tries to keep his or her identity a secret.