Withoutwarning,millionsofmysteriousalien"door[展开]

　Withoutwarning,millionsofmysteriousalien"doors"suddenlya eararoundtheglobe.Inarushtodeterminethereasonfortheirarrival,mankindmustworktogethertounderstandthe ur oseofthesecosmicanomalies.Bizarreincidencesoccurringaroundthesentientdoorsleadshumanitytoquestiontheirownexistenceandanalteredrealityastheyattem ttoenterthem [收起]