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Three young programmers come across an abandoned technology meant to detect supernatural presence. They reverse engineer the tech and create an app for their phones which allows them to see ghosts, thus endangering their own lives.。韩国JTBC的综艺节目，邀请韩国歌手前往陌生的国度旅行，在没有人知道他们的地方举行街头公演，用音乐向大众介绍自己。第二季出演者为朴正炫、河琳、金伦我、尹健、李善圭、Henry、Roy Kim、李秀贤，分成两组分别前往欧洲。。