Credit: Video Still

We know Hanna (Ashley Benson) is desperate to save her mom from a lifetime in jail, but based on this sneak peek of Pretty Little Liars Season 4, Episode 8: "The Guilty Girl's Handbook" (July 30), her latest plan to help her mom is plain crazy.

In this clip, we see Mona coach Hanna on the best way to confess to killing Wilden. Yes, you heard that right: It looks like Hanna is thinking about taking the blame, and Mona is helping her craft a story that will (theoretically) convince the police (or jury, down the line) that the murder was actually in self defense.

Wow. That's a daughter's love, right there — but we know Ashley would freak if she realized what Hanna was thinking about doing. And you know who else might freak? Caleb, who shows up at the end of the clip. Maybe he can talk some sense into his self-sacrificing girlfriend.

Here's the official synopsis of the episode:

Hanna comes up with a desperate plan to save her mother from a conviction and turns to the only person she thinks can help — Mona. Caleb tries to convince her Mona can’t be trusted, causing Mona to prove her loyalty in the most unexpected way. And Spencer returns to an old haunt to investigate new evidence relating to Wilden and his surprising ties to another mysterious death.

Meanwhile, “A’s” recent machinations take their toll on Emily and her mom, driving Emily to reconnect with her old boss Zoe (Rumer Willis) to look for an escape.  And Aria relies on Jake (Ryan Guzman) to help her understand Mike’s new attitude, leaving them both confused about the nature of their relationship.

Check it out below!

Credit: YouTube Photo: Pretty Little Liars Season 4, Episode 8 Sneak Peek — Hanna's Plan (VIDEO)

Catch the episode on Tuesday, July 30, 2013 at 8 p.m. ET/PT on ABC Family.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.