In the whirlwind of wedding planning, a groom and his three best men discover a catastrophic oversight: they have completely forgotten to invite the groom's sister, Barb. Starring Leonid Barats, Kamil Larin, and Rostislav Khait as the panicked groomsmen, this comedy from director Dmitriy Dyachenko throws a group of longtime friends into a race against the clock. With the ceremony fast approaching, their desperate mission to find Barb, played by Zhanna Friske, and deliver an invitation unleashes a chain of comedic misadventures across the city. As they navigate ex-girlfriends, overbearing family members like Nonna Grishaeva and Nina Ruslanova, and their own chaotic lives, the journey tests their friendship and reveals long-buried secrets. This romantic comedy blends heartfelt moments with hilarious chaos, exploring how sometimes the path to "I do" requires confronting everything you've left unsaid.