"Insight into the Truth of Marriage" revolves around the marriage life of Lin Xiao and Zhang Yu. Starting from the happy wedding, Lin Xiao also felt a little uneasy while looking forward to the future. The honeymoon trip has both sweetness and quarrels, which makes them understand that marriage requires understanding and tolerance. After returning to daily life, the trivial matters of daily necessities, the balance between work and family, and the subtle changes in the relationship between mother-in-law and daughter-in-law have all brought many challenges to their marriage. They move forward in constant exploration, work hard to deal with various problems in life, and guard this hard-won marriage.