Driven by a hidden agenda, Dave convinces Susan to throw Mrs. McCluskey a surprise party for her 70th birthday. Jackson wants to take his relationship with Susan to the next level. Gabrielle's concerned she might be pregnant. Tom tells Lynette he's sold the pizzeria. A startling reason for the bond between Bree and Katherine is revealed. And finally, an outraged Mrs. McCluskey has the entire neighborhood questioning her sanity.

Gaby is over the moon when Carlos' client makes them an offer they can't refuse, but a startling discovery leaves her second guessing. Lynette grows suspicious that Tom is cheating on her. After breaking up with Jackson, Susan tries to surprise him, only to find the surprise is on her. Meanwhile, the bond between Bree and Katherine grows. Finally, Mrs. McCluskey enlists the help of her sister Roberta (guest star Lily Tomlin) to dig up dirt on Dave.

Lynette and Tom uncover the unsettling truth about son Porter. Gabrielle suspects Carlos' best client, Virginia, has ulterior motives. Bree's moment of weakness could bring her great embarrassment and shame. Katherine's not-so-little secret is unveiled. Susan learns of Jackson's true passion. Finally, Mrs. McCluskey's sister Roberta unearths a disturbing fact about Dave.

For Gaby and Carlos, injuries sustained in the fire lead to a fortunate discovery. But for most, the consequences are less forgiving. Lynette and Tom vow to protect son Porter at any cost. Susan must learn to let go of the man she loves. Orson's attempt at a good night's sleep puts Bree in a most precarious, though amusing, position on the day of her big cooking demonstration.

Lynette takes extreme measures to protect her son. Carlos realizes the extent of Gaby's sacrifices for their family. Bree wants to prove to Andrew that she has accepted him for who he is. Katherine finds happiness, as Susan and Mike recognize the fate of their relationship. Meanwhile, Dave starts to lose his grip.