Social media superstar Sam receives a threatening e-mail that hits close to home, prompting her to reach out to her ex, Ethan, for advice. Together, the two begin to realize these strange, connected emails may have larger ramifications for more than just them. Meanwhile, a wallflower's rise to stardom on a hot new app puts her in the cross-hairs of an international syndicate on the dark web.

The gang finally unites in Texas as the circumstances surrounding their missing friend become more urgent. An old friend of Molly's provides important perspective on her final days and a possible way forward. Meanwhile, a black market organ purchased off the dark web yields disturbing side effects for its new owner.