Illustrator Su Wan mistakenly identified her blind date partner and hastily registered for a flash marriage with group president Lu Shiyan. Originally an agreed-upon marriage to cope with elders' urging, the two gradually developed feelings for each other during their daily interactions. The ex-boyfriend's appearance made Lu Shiyan face his feelings squarely, and further brought to light the childhood bond of being saved by the riverside fifteen years ago. From a blundering encounter to a destined lifelong companionship, the cold president used his full devotion to turn an accident into a lifelong sweet companionship.