Kirsten grows suspicious of her coworkers after she uncovers an algorithm for the Stitchers program in the hidden papers of a conspiracy theorist. Meanwhile, a surprising source sends Kirsten mysterious messages.

Kirsten's boyfriend visits her unexpectedly, and Maggie decides to do some research on him, since the whole team is surprised to learn that Kirsten has a beau. Meanwhile, a woman's lavish social life may yield clues about her death.