William Smith is a single,eligible bachelor who has been unlucky in love. He's had only a few girlfriends and recently,no woman would even give him the time of day.Even when he gets lucky and lands a smoking-hot woman as a roommate in his rent-controlled apartment,she hardly even gives him the time of day.Then,one day,Mr. Smith goes to his town library to catch up on some reading when his life changes forever when a little baby girl calls him "Daddy". Suddenly,everyone he knows claims that this little girl he found is,in fact,his baby daughter and suddenly,his smoking-hot roommate claims to be his wife and now William must find out if this is just a hoax or the life that he never knew he had.