Respect the Elderly, Love the Young

Xiao Han is on a bus heading to her brother's engagement banquet when she runs into a pair of unreasonable elderly passengers who demand she give up her seat. Xiao Han refuses, explaining that she's on her period and feeling unwell—but the old man simply plops himself down onto her lap, sparking a confrontation. The old man bumps his head, demands the driver stop the bus, and when the driver refuses, he forcibly grabs the steering wheel, causing a car crash. Later, the old man's daughter, Wu Xinran, arrives and falsely accuses Xiao Han of being a homewrecker—yet she turns out to be Xiao Han's brother's fiancée. In the end, the wedding is called off, and she is left drowning in regret.