dddWithoutwarning,millionsofmysteriousaliendoorssuddenlyappeararoundtheglobe.Inarushtodeterminethereasonfortheirarrival,mankindmustworktogethertounderstandthepurposeofthesecosmicanomalies.Bizarreincidencesoccurringaroundthesentientdoorsleadshumanitytoquestiontheirownexistenceandanalteredrealityastheyattempttoenterthem.