The show, which is based on a book of the same name by author Caroline Kepnes, follows Penn's character Joe, a manager/sociopathic, who becomes OBSESSED with college student Beck. He quickly stalks her, infiltrates her life and friendship group, and takes control of her entire life in a deadly way.
WILL SEASON TWO FOLLOW THE SECOND BOOK?
So what's the plot line? The sequel is called Hidden Bodies, and it will pave the way for the show.
Hidden Bodies sees Joe move to Los Angeles to try run away from what he has done. Unfortunately, nobody can run forever. But for Joe, the speedbump comes in the form of a new girlfriend to obsess over.
"Joe can't stop looking over his shoulder," Kepnes has said of the second book.
"The problem with hidden bodies is that they don't always stay that way. They re-emerge, like dark thoughts, multiplying and threatening to destroy what Joe wants most: true love.
"And when he finds it in a darkened room in Soho House, he's more desperate than ever to keep his secrets buried. He doesn't want to hurt his new girlfriend—he wants to be with her forever."
According to Gamble, Joe also struggles with living in LA, which is basically everything he hates: the opposite of New York.
"[H]e is a die-hard New Yorker so I can't say that he comes to LA and he instantly falls in love with the place. At least at first glance, this is not Joe's kind of town," Gamble told THR.
But we can't be sure if the show will follow the same storyline. We mean, they diverted from the book's ending in the show. At the end, Joe's infamous ex Candace returns, after she was assumed dead. This doesn't happen in the book.
"We started by talking about how people would presume that he has killed her and be increasingly convinced that he had done so the more that they know about Joe throughout the season," Gamble told THR.
"So we just wanted to do something more surprising and realise that she was such a substantial and interesting character."
WHO WILL BE CAST IN SEASON 2?
Penn will obviously return as Joe in season two, as will Ambyr Childers, who plays Candace.
But Peach and Guinevere are dead, so we can assume they're gone from the cast.
Gamble didn't confirm whether John Stamos would return as Dr Nicky (the therapist), who was framed for Beck's murder by Joe.
"Dr Nicky is in prison and he is ardently protesting his innocence," Gamble told THR. "It's too soon to say definitely whether John Stamos will return in season two but we have been talking a lot about the character and we're excited to keep telling that story."
As for Paco, Joe's young neighbour, we're also unsure if he will return, as he resides in New York in the show.
This articile originally appeared in Girlfriend.