It’s time to get the last pack member back. In “Teen Wolf” Season 5B, episode 15, Scott (Tyler Posey), Stiles (Dylan O’Brien) and the pack will try to get Lydia (Holland Roden) out of Eichen House. However, as always, the plan isn’t quite as simple as they hoped.

“Stiles learns that Lydia is in imminent danger and develops a plan to break her out of Eichen House,” the MTV synopsis reveals. The trailer for episode 15, titled “Amplification,” shows that Stiles wants to simply get her out, no distractions or confrontations.

Watch the “Teen Wolf” Season 5B, episode 15 promo below:

But this is “Teen Wolf,” so obviously Stiles’ strategy won’t go well. “Theo [Cody Christian], however, has his own plans for her,” the synopsis teases.

Viewers will catch up to the flash-forward from the midseason premiere soon. That was when Theo tried to break in to Eichen House to take Lydia. Fans will remember that he didn’t actually want Lydia. He said he wanted the hellhound, Parrish (Ryan Kelley). It seems like the pack might find out about his plan. In another promo video, Scott says Lydia is in serious danger.

“If we don’t do this, we lose Lydia,” Scott says. “She’s gonna die in there tonight, and she might take a lot of innocent people with her.” Watch the promo below:

Although the gang will try to get Lydia out in episode 15, viewers shouldn’t expect her to be rescued until episode 16. “Her finding her power is critical to the season,” showrunner Jeff Davis told Entertainment Weekly. “That’s why we decided to make episodes 15 and 16 a two-part episode around her, which is the breaking-Lydia-out-of-Eichen episode.”

“Teen Wolf” Season 5B, episode 15 airs Tuesday at 9 p.m. EST on MTV.