1984 is a year where many changes take place, such as the signing of the Sino-British Joint Declaration as well as the opening of New Town Plaza and the first dragon boat race on Shing Mun River. Tse Chi-lung "Lung" (Lam Yiu-sing), a resident of Wo Che Estate, and his neighbour and long-time friend Fan Chun-wai "Wai" (Tony Wu) enter Kei Kok College, a lowest-tier secondary school whose students' discipline is notorious in Sha Tin District. Kei Kok's principal, Lu Kwong-fai (Liu Kai-chi), receives fundings from the District Board with the support of District Officer Mr Tsang (Poon Chan-leung) to establish the territory's first Chinese teenage baseball team, which he believes can turn bad students good. Acting also as the coach, Lu recruits Lung, Wai and eight of their fellow schoolmates, who all live under uneasy conditions, to the baseball team named the Shatin Martins. He enforces strict discipline so as to remind the members to work and behave as a team, especially after their first humiliating defeat to a junior team. Lung often looks up to Wai, who is smarter and physically stronger than him. Wai has started a romantic relationship with his schoolmate Tsz-ching (Hedwig Tam) whereas Lung does not even dare to speak to Ling (Sadie Wang) whom he has a crush on. After Wai is chosen as the pitcher of the Shatin Martins, he takes pride in himself and belittles his teammates. In the first match of the Little League, Wai starts a fight with the rival team, prompting Lu to publicly replace him with Lung. Feeling betrayed by his friend, an ashamed, Wai withdraws from baseball and school, rejoins gang activities and abandons his now-pregnant girlfriend. Lung is at first angry with Lu for alienating Wai, but later reconciles with him. With the departure of the most outstanding member, the Shatin Martins work closer and train harder together, finally winning the tickets to the final of the league. Right before the final match, Lung experiences several shocks in his life. First, his family is torn apart by his mother's extramarital affairs. Second, although he has summoned the courage to speak to Ling, she has a boyfriend already. Third, he finds out Wai is involved in illegal acts in order to attempt to provide subsidy for Tsz-ching's abortion since she is now on her own after splitting with her family. But she refuses to give up her baby. Lu reminds him to stay focused as the half-a-step he takes at the pitcher's mound will decide the fate of the team. At the final, the Shatin Martins have a hard match against the Japan-based Buffaloes, being far behind in four innings. Wai cannot keep his promise to show up to support them, as he is performing a dangerous mission. Worried about Wai, Lung fails to concentrate on playing and is hit in the face by the ball struck by the batter. As he falls onto the ground, he realises he must stand up by himself to prove himself capable to Wai. The Shatin Martins manages to come up from behind and eventually wins by 13-12, becoming the first Hong Kong team to win the championship. Although Wai is seriously injured, he survives and is taken care of at hospital. Lung learns how to adapt to changes, looking to his father and Tsz-ching as examples. Lu remains unmarried and dedicates himself to education and baseball. In recognition of the historic title, the government names a bridge over Shing Mun River after the team. On the eve of the 30th anniversary of the Shatin Martins, Lung visits the Admiralty Occupy Site during the Umbrella Movement and recalls the spirit of not giving up hopes despite of failures.