影片主要讲述了少女江函（陈都灵饰），意外坠入一款众多年轻玩家聚集的名为《万梦千魂》的全息游戏中，并惊讶的发现自己父亲（佟大为饰）竟是游戏的设计者。但事情远不止这么简单，神秘游戏世界中隐藏着惊天的秘密，似乎与15年前一起群体失踪案有关。为了找寻答案，于是，她与高冷俊美的南极（宋威龙饰）和热情温暖的程序人寿司（张宥浩饰）集结成冒险小队，一群年轻人开启了超现实的冒险之旅。A story revolving around a group of gamers on an adventure that far exceeds the confines of reality. Jiang Han (Chen Duling) accidentally comes across a game and discovers that her own father (Tong Dawei) is the developer behind it. However, she also discovers that things are not as they seem and that it involves an incident 15 years ago where a group of people were declared missing. In her quest for the truth, she forms a team with Nan Ji (Song Weilong) and Shou Si (Zhang Youhao) ad they embark on a journey to save the missing people.