Two former enemies from high school whose lives keep intersecting end up in a contract marriage with each other as adults. Xu Jian'an is an unknown author whose family is in a tough spot. To alleviate her situation, she has no choice but to agree to enter into a contract marriage with Lu Boyan. Lu Boyan has become a guru in the world of investments. The two people who have very different temperaments are also at odds due to a childhood misunderstanding, yet they must know to learn to live together. A sweet cohabitation war under the same roof ensues.