Complex sentence: Ruth looks forward to celebrating Christmas with her brother when she notices an heirloom is missing from her flat and plunged into a world of stolen phones, heroin overdoses and male prostitution, Ruth realises that she's likely to face Christmas alone.
Split into simpler sentences: Ruth looks forward to celebrating Christmas with her brother when she notices an heirloom has gone missing from her flat. As she's plunged into a world of stolen phones, heroin overdoses and male prostitution, Ruth realises that she's likely to face Christmas alone.