With her new husband in prison, Shamima Begum is left in the care of a stranger, but who is he? Josh travels to the heart of the former caliphate as he searches for clues and investigates what her life with the Islamic State group was like.

Reporter: Josh Baker Written by: Josh Baker and Joe Kent Producers: Josh Baker, Sara Obeidat and Joe Kent Composer: Firas Abou Fakher Theme music: Sam Slater Mix and sound design: Tom Brignell Production coordinator: Janet Staples Series Editor: Jonathan Aspinwall Head of Long Form Audio: Emma Rippon Commissioning Executive: Dylan Haskins

This episode contains descriptions of violence, sexual violence, and has upsetting content