Young 15-year-old Marivita (an Australian girl) has an unrecognisable mark starting to engrave into her hand over time. She doesn't know what is causing this and she won't get her answer till her mother makes her come on an unexpected visit to Columbia. Meanwhile, in the Madrigal household, an unexplained door appears in their 'casita'. Everyone wants to be the one to find out what it is but sometimes mysteries stay unsolved.