一名轻度自闭的航天工程师罗伊，他的父亲在20年前离开地球前往海王星，寻找外星智慧生物。不料任务失败，有去无回。而罗伊此次也要飞越太阳系，找到父亲，并查清当年失败的原因。

影片讲述了一对警察兄弟，弟弟健诚（黄宗泽 饰）为卧底，哥哥健忠（谢天华 饰）为缉毒警，兄弟俩互在警方和贩毒集团的黑名单上，随着一场押送毒贩的任务，二人卷入其中，展开了一场无间反转的缉毒故事。

美国女作家Shirley Jackson的短篇《摸彩》的电影版。Shirley Jackson's superb short story "The Lottery" has been filmed three times, most notably in 1969 as an acclaimed short film which director Larry Yust made for an Encyclop?dia Britannica educational film series. The Academic Film Archive cited Yust's short as "one of the two bestselling educational films ever".Larry Yust's short film, The Lottery (1969), produced as part of Encyclop?dia Britannica's "Short Story Showcase" series, was ranked by the Academic Film Archive as "one of the two bestselling educational films ever". It has an accompanying ten-minute commentary film, Discussion of "The Lottery" by USC English professor Dr. James Durbin. Featuring the film debut of Ed Begley, Jr., Yust's adaptation has an atmosphere of naturalism and small town authenticity with its shots of pick-up trucks and townspeople in Fellows, California.

电影以发生在美国爱达荷州锯齿山脉的一则寓言式的猎狼故事展开，在白雪覆盖的雪山之巅、满山遍野针叶林高耸的神秘丛林中，观众跟随镜头可以欣赏到美国西部原始森林所呈现出的绝美自然的风景画卷。