In order to raise money for her sister's surgery, Lin Zhiyi signed a "love contract" with Jiang Yuzhou, the proud son of the finance department. He needs a girlfriend to resist marriage, and she needs life-saving money. The two agreed on everything, including the phrase "don't be tempted". But when he stood up for her time and time again, when she was neither humble nor haughty in front of his family, the pretended tacit understanding gradually became mixed with sincerity. When the contract expired, on a snowy Christmas Eve, Jiang Yuzhou held her in his arms and said in a hoarse voice, "The contract is over. Now, can I officially pursue you?" From a lie limited in summer to a fake love for the rest of their lives, they rushed together to a mutual heartbeat limit.