Selena, a low-level secretary, is diagnosed with acute leukemia and has only three months to live. She lets herself go completely and has a one-night stand with Wall Street tycoon Ethan after getting drunk. She tears off her cowardly disguise, fights back against her bullying boss and snobbish colleagues, and puts a price on the tycoon’s ambiguous advances. Ethan’s migraines can only be relieved by Selena, so he proposes a marriage of convenience. As they spend time together, Ethan falls deeply in love. He accidentally discovers the truth about her cancer and spares no expense to develop a special medicine. He fights against his family and her toxic relatives for her. In the end, Selena is cured. The two break through class and life-and-death barriers to stay together happily.