失恋穷困的留学生（宋芸桦 饰）、朝圣嘻哈街舞的青年（姜涛 饰）、面对家庭问题与孩子心理疾病压力的移民夫妻（姚淳耀、魏蔓 饰），异乡的生活充满挑战，相互争吵却又彼此依赖，在理解与追梦的过程，友情、爱情、亲情成为他们坚守的一切。
Childhood friends Tommy and Tuppence meet in London after having served in World War I. Recently "demobed", short of money, and with no job prospects, they decide to become adventurers for hire. Soon, they are employed by the British Government to locate a secret treaty signed before the war.
