The women decide to go ahead with the big dinner party that the late Mary Alice Young had planned to host, despite the more-than-minor disturbances in their own lives. Adulterous Gabrielle finds herself with a nine-year-old blackmailer who catches Gabrielle in the act in her affair with gardener John. Also, Bree struggles to keep her crumbling marriage a secret. Lastly, Susan bares all--in more ways than one--as she confronts her ex.

Cash-strapped Mrs. Huber figures out that Susan had something to do with Edie's house fire and tries to blackmail her. Meanwhile, Carlos becomes suspicious that Gabrielle is seeing another man, but targets the wrong suspect---the cable guy instead of gardener John. Also, Lynette balks when the twins' teacher insists the boys have ADD but tries to salvage the matter by seprating the boys. Lastly, Bree struggles with her rebellious son Andrew after Rex moves out.

Lynette locks horns with officious mom Maisy Gibbons at the twins' school who is trying to produce a "politically correct" play about "Little Red Riding Hood." Meanwhile, Susan continues to investigate the mystery of Zach's sudden disappearance. She soon finds out his father Paul put him in Seacrest, a mental institution. She and Julie then go to investigate.

Mama Solis comes closer to discovering Gabrielle's dirty little secret of her affair, and Bree comes undone when Rex suggests they hire a sex surrogate.

Uber mom Maisy Gibbons returns, and her secret life intersects with Bree's. Meanwhile Gabrielle's predicament worsens as she gets a taste of her own medicine, courtesy of Carlos's jailhouse confession. Susan plans to take her relationship with Mike to the next level, and Lynette, suspicious (and a little jealous) of her new nanny decides to secretly videotape her. Lastly, Susan sends Zach Young back home to his father, who makes a startling admission of his own.

Edie organizes a neighborhood search for the missing Mrs. Huber, just as the absent busybody's sister Felicia Tilman arrives on Wisteria Lane. Meanwhile, Bree resigns herself to her marital state and asks an attractive pharmacist on a date. Susan's ex Karl suddenly reappears in her life, and Lynette fears that Tom is attracted to the new nanny. Lastly, Gabrielle sinks to new depths.. she gets a job.

When Lynette's father-in-law pays a visit to to the family, she unwittingly learns a family secret. Meanwhile, Susan is disturbed by Julie's growing romance with Zach. Rex attempts to reconcile with Bree as she tries to play hard-to-get. Lastly, Gabrielle is shocked when John's parents ask her for a favor in convincing John to move back home as he officially turned eighteen and no longer wants to live at home and trying to pursue a relationship with Gabrielle.

It's Valentine's Day on Wisteria Lane, and love is all around (sort of), as Susan looks forward to a romantic date with Mike, until she learns a surprising fact about her favorite plumber. Meanwhile, after reconciling their relationship, Bree discovers something new about her husband Rex when it comes to his sexual needs. Lynette's neighbor accuses the Scavo twins of thievery as Lynette tries her best to handle the situation. Lastly, Gabrielle's work adventures continue as she gets a gig as a mattress model.