Wang Defa, a greedy village tyrant, wants to seize the high-tech watermelon greenhouse leased by Li Chundong, an outsider. He gathers his men to brutally cut off the water and electricity, then forces Li to sign an oppressive debt-settlement agreement demanding ten times the compensation for any breach of contract. Li Chundong appears to accept defeat, but secretly uses a concealed underground water circulation system and solar power to keep his watermelons alive while recording evidence of Wang's destruction. Convinced he has won, Wang takes out a high-interest loan to fund his scheme and even copies the tenfold compensation clause into a supply contract with a wealthy businessman from the city. But on the night before delivery, Li Chundong uses smart equipment to move every watermelon and machine out of the farm overnight.