Sandy starts falling for a handsome doctor, and Martin may not be able to handle it. Elsewhere, T-Bone and Ruthie want to do something romantic for Valentine's Day, and they profess their love for each other in an unusual way. The Colonel and Ruth drop by unexpectedly, prompting Lucy and Kevin to leave town, and Eric fears that his parents know about his health problems.

When small things happen, some Camdens see them as signs. Lucy and Eric both cross paths with a black bird. They both come to the conclusion that this is a sign, and a bad one at that. Meanwhile, Ruthie gets a sign on her own. When she loses a diamond in the ring that T-Bone gave her as a promise to get engaged someday, she thinks that this is her sign that maybe being with T-Bone is not the best choice.

With plans for another child, Lucy tells Kevin that it might not be a good idea to move so far away from the rest of the family. T-Bone confides to Eric that he's having second thoughts about breaking up with Ruthie, who is spending all of her free time lately with her former crush, Martin. Sandy's boyfriend surprises her with a marriage proposal, and T-Bone's estranged father shows up on the Camdens' doorstep.