In the ancient Spring Breeze Lane, Shen Yanzhou guards a jam shop, and business is sluggish. Lin Wantang helps him sort the accounts, discovering that the mountain goods merchant Manager Gu is using a bundled sales agreement to suppress prices. If the agreement is signed, the shop will be at the mercy of others. The two use wild fruits to test a new formula, borrow Liu Sanniang's tea stall to have people test the flavor, and have Zhao Aliu deliver samples via a new route. After Manager Gu tries to obstruct them several times, Shen Yanzhou and Lin Wantang counter with a profit-sharing agreement, saving the small shop and also brewing a sweet and fragrant reputation.