Kouhei Araki, a seasoned editor at Genbu Publishing, decides to retire to look after his sick wife. Before leaving, he must find a successor for his latest project: crafting The Great Passage dictionary. Despite the challenge of finding the right person with the necessary patience and dedication, he discovers Mitsuya Majime from the sales division. Majime may struggle socially and lack emotional intelligence, but his passion for words and meticulous nature captivate Araki, leading to an unexpected offer to join the dictionary team. Uncertain of his fit among his new colleagues, Majime embarks on this linguistic journey, where the power of words in The Great Passage unites them all.