Zachary struggles to reclaim an "emotional investment" of 50,000 yuan from Lucy, his ex-girlfriend, the sum of all the money he transferred to her during their loving moments. Hoping to recover the substantial amount, he finds himself caught in a cycle of humiliation and frustration after their breakup. Despite his best efforts, meeting her in person, teasing her online, and even taking legal action, he fails to recoup any money. Simultaneously, he enters a calmer relationship with Ruby, his new girlfriend, making much smaller emotional investments. However, as he plans their wedding, Lucy surprises him by returning part of the money, stating she too made financial sacrifices in their relationship. The unexpected refund leaves Zachary with mixed feelings, but he eventually chooses to appreciate this belated windfall and move forward with his life.