Zhang Yan and her husband, Zhao Bin, were a long-haul trucking couple, spending most of their time on the road, living a nomadic lifestyle typical of long-haul truckers. However, Zhao Bin's behavior had recently become increasingly erratic: he refused to sleep in the cab, preferring the solitude of the cold cargo space over the cramped cab; he would always serve two bowls of food, one intentionally left plain without spicy seasoning; and he left a two-square-meter space empty when loading cargo. Whenever Zhang Yan tried to approach the cargo area, he would fly into a rage and scold her harshly.
Zhang Yan suspected her husband of having an affair and hiding someone. She heard a woman's screams coming from the cargo area at a rest stop and later, during an argument, pulled out a woman's scarf or piece of clothing from Zhao Bin's collar. Infuriated, she called the traffic police to inspect the cargo area, only to find it filled with items of an intimate nature. Zhao Bin's vague explanations only deepened her suspicions.
A mysterious young woman seeking a ride appeared out of nowhere but vanished mysteriously after Zhao Bin privately spoke with her in hushed tones. At a repair shop, when Zhang Yan was harassed by a stranger, her husband's indifference was as cold as the winter wind. All clues pointed to Zhao Bin's betrayal. In a fit of rage and desperation, Zhang Yan picked up a wrench, determined to smash open the cargo area and uncover the truth that had haunted her for months.
