Pip fakes a sprained ankle at school so Cara will ask Elliot Ward to give her a lift home. Cara helps Pip to the teachers' car park, joking with her as usual, which makes Pip feel guilty and afraid for how the truth about Elliot may hurt Cara.

Elliot agrees to drive Pip home. During the ride, Pip hides her phone under the back seat while pretending to check her ankle. She asks about his tutoring plans, and Elliot says he is going to Old Amersham, giving Pip and Ravi a route to test against the phone's location.

After Elliot drops Pip off, Pip stops limping and lets Ravi into her house. In Pip's room, with her door open under Leanne's suspicious instruction, Pip and Ravi track the phone through Find My Friends. The phone first appears at the Wards' house, then begins moving.

Ravi repeatedly refreshes the map as Elliot drives away from the route to Amersham and instead heads north on the A413. When Elliot stops on Mill End Road in Wendover, Pip remembers that the Wards used to live in Wendover before moving to Kilton.

Pip and Ravi use Google Maps Street View to identify the likely destination as number forty-two or forty-four Mill End Road. Pip realizes she can ask Cara whether one of those houses was the Wards' old home, and she becomes overwhelmed by the thought that exposing Elliot will destroy Cara and many others.

Pip wants to go to Wendover immediately because Andie may be alive there, but Ravi refuses to let her jeopardize her Cambridge exam or act impulsively. Ravi persuades Pip to wait until after school the next day, either to investigate when Elliot is absent or to send an anonymous tip to police, and then forces Pip to focus on studying and sleeping.