Five happy years after Mary's arrival in Three Men and a Baby (1987), the three ecstatic single fathers and still-unrepentant bachelors, Peter, Michael, and Jack, find themselves living under the same roof with her British actress mother, Sylvia. However, things take a turn for the unexpected when Sylvia decides to move to the United Kingdom after a promising business proposition combined with a welcome marriage proposal by her director and fiance, Edward. In low spirits, Peter, Michael, and Jack travel to London, where one of them discovers that he has deeper feelings for Sylvia and that Edward might have a secret agenda. Will the three men and their little lady let Edward break up their family?