Plans for a brother-sister reunion after a three-year gap go horribly wrong in the taut thriller MARCUS. A man called Marcus claims to be Roger's sister's boyfriend, but with his sibling nowhere to be seen, Roger soon starts to worry. Marcus explains that she will be with them shortly, but when she fails to appear suspicions start to rise and are compounded by the presence of a former friend of Roger's, who is accompanied by his ex-girlfriend. Secrets are soon exposed, and the brutal story line develops a few shocking twists and turns.