Ted's long-awaited mother, the woman of his life, finally appeared! The show has been on for eight years, and the ninth season is the final season. In the past eight years, the protagonist Ted (Josh Radnor) has gone from dreaming of becoming an architect to becoming a university professor, from almost entering the marriage hall to the cancellation of the wedding. Ted has been bumping along the way, with mixed feelings of sadness and joy. He has experienced several failed relationships and is now single. Although he still can't let go of his ex-girlfriend Robin, he sincerely wishes Robin and Barney well. At the same time, Lily and Matthew are also facing an important turning point in their lives. Lily is about to go to Italy to start a new career, and Matthew has also got the coveted position of judge. Will the couple separate? What will happen at Robin and Barney's wedding? In what way will "Mom" meet Ted?