After Piper is hired to cater an upcoming wedding, she and her sisters suspect that the bride-to-be is a demon set out to marry the groom against his will so she can become pregnant with his child. Following the death of the priest who was set to perform the ceremony and Phoebe's premonition of a demon baby being born, the sisters set out to help save the groom so he can marry the right girl.

When a warlock from the future arrives in town to kill the people involved in developing a vaccine against evil warlocks, Phoebe has to find his next victim before he does. Meanwhile, after Prue casts a truth spell to see how Andy will take her being a witch, she accidentally includes Piper and Phoebe in on it too. They then begin to realize that while being told the truth can be a good thing, though in some cases, it can really hurt feelings as well.