It's Valentine's Day and happy couple Jim and Pam are not invited when all of the single people in the office decide to throw a Lonely Hearts party. Meanwhile, Michael thinks he may have a connection with the woman giving blood next to him at the office blood drive.
Michael causes a huge problem in the office when he comes up with the idea to put "golden tickets" into packages of paper for clients to redeem for discounts. Andy, Jim and Pam give Kevin differing advice on wooing a woman.
Michael has big plans for his 15th anniversary party at Dunder Mifflin, but is in for a shock when the new, no-nonsense vice president has some ideas of his own. Meanwhile, Jim's prank on Dwight has some unexpected results.
Michael decides to open a cafe-disco in his old office. Pam and Jim are planning a secret trip.
A cryptic message penned in human blood is discovered at a national monument. As the Jeffersonian team embarks on a scavenger hunt to solve the case, they realize their tech-savvy suspect (guest star Andrew Leeds) remains one step ahead of them. Meanwhile, Booth and Brennan search for the perfect home for their new family.