Two strangers meet in a subway car. Both bring their past with them. Both look from their present. Both will determine their future in that fleeting, and ephemeral, vital journey that brings them together briefly.。历史中“玄武门之变”甚多隐讳。但到底隐讳了哪些事实,却不明究竟。对此千年疑案,本片为您解答。。