In an exclusive preview for the July 17 episode of Cruel Summer, Megan and Isabella are seen drugging Luke in order to get answers from him.

The preview begins with Megan and Isabella preparing drinks for themselves and Luke at the cabin. Isabella admits that she’s nervous, but Megan assures her that she won’t be for long.

In the background, Luke can be heard talking. At one point, he says, “Guys, can you please let me out?” Megan then takes two pills and breaks them into a drink she’s making for Luke. “Voila… truth serum. And liquid courage for us,” she says.

This preview comes after the events of the previous episode, in which Megan learned that Luke was the one who had been trying to kiss Isabella, not the other way around. She also overheard Luke talking about how he had both Megan and Isabella wrapped around his finger.

Megan’s discovery enraged her, and she set out to get revenge on Luke. The truth serum that she’s using in the preview is likely an attempt to get Luke to confess his crimes.

The synopsis for the July 17 episode reads: “In summer 1999, new friendships are formed and secrets are kept as the crew approaches senior year at the annual school car wash. In winter 1999, Megan and Isabella push for answers. In summer 2000, Debbie wants to protect her daughter.”

It’s clear that Megan and Isabella are determined to get to the bottom of what happened between them and Luke. The truth serum is a risky move, but it could be the only way to get Luke to tell the truth.

The July 17 episode of Cruel Summer airs on Freeform at 10 p.m. ET.