Things have not been going well for the Marins in Pretty Little Liars Season 4, and based on this spoiler-y synopsis of Season 4, Episode 8: "The Guilty Girl's Handbook," Hanna will turn to a surprising ally for help.

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Here's the official ABC Family 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.

We're definitely looking forward to the Hanna-Mona storyline in this episode. Those two are a guaranteed good time, and we can't wait to see what Mona does to prove her loyalty.

We're also very intrigued to find out what other death Wilden has "surprising" ties to. Ali? That wouldn't really be surprising. Garrett? No, we already know he's involved with that. Maybe Ian, from way back when?

It's also nice to get a bit more info on Rumer Willis' character, and we're interested to see where Aria and Jake go next...

Are you looking forward to this episode? Sound off in the comments below.

Find more Pretty Little Liars spoilers here.

Catch the next episode of Pretty Little Liars on Tuesday, July 16, 2013 at 8 p.m. ET/PT on ABC Family.

Source: ABC Family

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