An ambiguous WeChat message sent to the wrong person completely destroyed Lin Xiaoyun's marriage. Faced with her "honest" husband who cheated on her during pregnancy and was scheming, she resolutely chose to leave the house, taking only her two young children with her. From a village primary school teacher to a single mother, she dealt with "mythical beasts" during the day and stayed up late at night to prepare for exams. After entering a prestigious county-level school, she used her pen as a sword, outwitted her "seniors" and solved difficult problems skillfully, and was promoted from grade director. But her ex-husband, who was very calculating, became increasingly mediocre in his new marriage. When she was on the runway with a rosy complexion and high spirits, and met her ex-husband and his wife who were already looking old and haggard, she realized that the best revenge is to live a more exciting life than before. This is a counterattack story of a woman rebuilding herself amidst the ruins of marriage, relying on her talent and resilience to finally win both career and life.