The series depicts the adventures of Veronica Mars (Kristen Bell) as she deals with life as a high school student while moonlighting as a private detective.
In this episode, Weevil (Francis Capra) asks Veronica for help in proving that Thumper (James Molina) killed Felix.
Meanwhile, Wallace (Percy Daggs III) breaks up with Jane (Valorie Curry), and Mac (Tina Majorino) confronts Cassidy (Kyle Gallner) about his hesitance to engage in an intimate physical relationship with her.
Logan (Jason Dohring) wins the essay contest to become Woody Goodman's (Steve Guttenberg) intern, and Veronica taunts him about having plagiarized it.
Veronica asks Logan about the night of Felix's murder, and he says the witness drove a San Diego seafood truck.
Veronica reports the dead-end to Weevil, who suggests Felix was killed because of his relationship with Molly Fitzpatrick (Annie Campbell).
At The River Styx bar, Liam Fitzpatrick becomes enraged when Molly mentions Felix’s murder, a conversation Veronica and Weevil record using a bug hidden in the toy truck.
In addition, "Plan B" features the final appearance of Eduardo "Thumper" Orozco (James Molina) after the character is locked in Shark Stadium just before it explodes.
[5] In its original broadcast, "Plan B" received 2.85 million viewers, marking an increase from the previous episode, "The Rapes of Graff".
Club gave a more mixed review, writing that "It's amusing that last week I was complaining that Veronica Mars wasn't ramping up its tension as it headed towards the end of the season.