It begins to rain heavily in Quahog, which soon begins to experience flash floods; as a result, the entire ground floor of the Griffins' house begins to fill with water,and they need to evacuate. Before the family can do that, however, Peter makes Meg go into the kitchen to retrieve a case of beer (and make a sandwich while she was at it), but the refrigerator is mostly submerged by this time. Meg is forced to go underwater, where her shirt snags onto one of the fridge racks. As she begins to drown, Peter goes into the kitchen at Lois' urging and rescues her. At the hospital, the family is informed that Meg has fallen into a coma, causing Peter to reflect on all the horrible things he's done to her in his life and promise to make it up to her if she ever recovers. She eventually does awaken, and Peter begins making good on his promise by showing her extra kindness and promising to do whatever he can to make her happy. However, when Meg announces that she wants to start going out with her new boyfriend - Michael Milano, a med student at a hospital to whom she awoke - Peter grows very distrustful and overprotective.
Peter worries that all Michael will care about is sex, but Meg argues otherwise, and restates that going out with him is what she wants. Lois suggests that Peter talk to Michael and get to know him better. He does and, after apparently warming up to him, allows Meg to go out. However, Peter still feels distrustful of him and spies on them during one of their dates. Michael feels uncomfortable and feels that he should break off their relationship, which upsets Meg. Stewie and Brian fix a wrecked house.Later, Meg shocks the family when she announces that she's pregnant. Peter concludes that the only thing to do is force Michael to marry her, and heads to his house; however, after learning of Meg's pregnancy, Michael turns out to be completely willing. Meg decides to go through with it, not wanting to go through an abortion, until the wedding ceremony, where she reveals to Lois that she's just found out she's not actually pregnant - instead, she had her period and assumes she read the test wrong. Lois suggests that Meg tell Michael the truth, and says that if Michael really cares about her, he will still understand and stay. When she tells him, however, Michael bails out completely without a word; Peter, on the other hand, who was present at the time, feels bad about bringing Meg into this situation and apologizes about his behavior. Then, realizing that there is really nothing else to offer the television audience, Peter decides to end the episode with footage of Conway Twitty.
In a secondary plot, Stewie proposes to Brian that they buy and renovate a wrecked house and sell it to get rich. However, neither of them are able to cope with the other, and they're unable to get the job done. In the end, the two go broke and the house begins to deteriorate beyond repair, so Stewie decides to blow it up (forgetting that an electrician they hired is still inside it).