What if mom was just a 99-day role, what if mom was just a job with a deadline? Xu Xingyuan, who suffered from the second child in her original family, became independent early and was afraid of raising children. In order to participate in medical support, her cousin Mo Yao entrusted her 5-year-old daughter to her. Xu Xingyuan was in danger and was in a panic about raising a baby. She was looking forward to returning to Mo Yao, but Mo Yao unexpectedly had a second child and had to ensure the pregnancy. In order to support her cousin's career and second child, Xu Xing is willing to take on another heavy responsibility. During the 99-day mother challenge, Xu Xingyuan also met many mothers and expectant mothers by accompanying Mo Yao through prenatal check-ups and miscarriage treatment for her second child.