A con man on the run from a vicious gangster takes cover from his past by assuming the identity of his prison cellmate, Pete, "reuniting" with Pete's estranged family, a colorful, dysfunctional group that threatens to drag him into a world just as dangerous as the one he's trying to escape - and, just maybe, give him a taste of the loving family he's never had.
The publication of a new dictionary titled The Great Passage progresses. Mitsuya Majime, originally from publisher Genbu Shobo's sales department, has been recruited by Kouhei Araki, a veteran editor of the dictionary department who is looking to retire soon. The dictionary department is known internally as the "money-eating insect," but Mitsuya uses his perseverance and attachment to the words in order to become a great editor. Mitsuya, who has poor social skills, finds himself working with another man named Masashi Nishioka, who is able to express himself better.
The black sheep of the Argyll family, Jack Argyll, was accused of murdering their matriarch a year ago, but now a man shows up on their doorstep claiming Jack's innocence. The family must come to terms with this news and the fact that the real killer might still be among them.