She doesn’t go to school and never leaves the flat by day. Sensing in each other a kindred spirit, the two become devoted friends. What Oskar doesn’t know is that Eli has been a teenager for a very long time…Jack Thorne's adaptation of Let The Right One In premiered in June 2013 at the Dundee Rep Theatre in a production by the National Theatre of Scotland, before transferring to London's Royal Court Theatre in November 2013.