Stan joins Roger and Steve's fictional detective agency, but he ruins the fun by being extremely incompetent at his "job." Roger demands that Steve fire Stan, but Steve cannot bring himself to do it and ends up lying to Roger. Things take a turn for the worse when Stan is kidnapped, and Steve must tell Roger the truth.
When Stan finally has enough money to afford a membership at the golf club he has worked at for the past thirty summers, his hard work and perseverance prove to be futile when the club gives a membership to Steve first. However, things are not all what they seem when Stan realizes who the club owner really is.
When Steve tries to prove himself as a macho man to Stan, he follows in Roger's footsteps and tries to change himself from the outside in with a superhero persona. Meanwhile, Francine is going through an identity crisis of her own when she receives surprising news that could change the family forever.
When Stan runs into his former crush from CIA boot camp, his affection for her resurfaces, which drives Francine into a jealous frenzy. By including Roger in her plan for revenge, Francine accidentally leads him straight into the arms of a dangerous alien hunter. Meanwhile, Steve is struck with good luck, when he accidentally wears Hayley’s panties to school.
When Stan realizes that he might never fulfill his dream of becoming a Best Man, he convinces his last single friend, Principal Lewis to marry the school’s Superintendent and to choose him as his Best Man. Stan invites Lewis’ old friend from prison to the wedding, only to discover a secret that could prevent the wedding from happening at all. Meanwhile, Roger finds the perfect pair of shorts, and an encounter with Ricky Martin makes him question his self-confidence.
Roger becomes Steve's legal guardian, but gets a little overzealous in the parenting department when he gets the principal fired. After getting beat up by the other teachers at the school, Steve decides to run away. Meanwhile, Stan and Francine attempt to make waves after discovering that their vacation at the biggest water park in the world fails to get their hearts pumping.