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A special agent of frontier force in Canton tries to find a spy called aunt Mei.
To restore communications to the island of Hainan, the People's Army sends scouts across the Palm Grove Strait to the Leizhou Peninsula, where the detachment radio station was located.
The film depicts the lives of Guangdong peasants who have gone through the suffering of the Sino-Japanese War only to experience home-grown oppression by a rapacious landlord in their village.