Ling, in his 20s, lives in Chongqing, the largest city in China. There she meets Yu, a Chinese business traveler who lives in Berlin. As a farewell, he has given her an iPhone. They start a tender relationship by phone. When Ling flies to Berlin to see Yu, another man, Marco, is waiting for her. He is Yu's German bodyguard. He should take care that Ling flies back again.