Medium of Exchange (2016)

Emma, a shy, studious young girl from Manchester sets off to London for her friend Sarah's 21st birthday. She arrives only to finds herself at an unruly house party with a bag that doesn't belong to her. Sarah and her house mates receive a phone call from the landlord the following day and must quickly clean up the house before he gets there, all while the contents of the bag and the bags mysterious rightful owner, remain hidden.