痴迷篆刻的年轻男子镇（小田切让 饰）连续数天被真实感极强的梦所困扰，当梦见开车撞人之后，他立即前往梦中的车祸现场，却发现这一切都曾真实发生。警方调取附近的录像，找到肇事逃逸的车辆，并从家中带走正在熟睡的汽车主人——刚刚结束一段恋情的兰（李娜英 饰）。兰拒绝承认罪行，然录像中的自己却确凿无疑证明了一切。最终查明兰患有严重的梦游症，令人难以置信的是，她的梦境竟与镇的意识相通。镇的梦操纵着兰的身体，去完成这一件件匪夷所思的事情。借着奇妙的机缘，两人走到一起，共同寻找着摆脱这恐怖之梦的办法，却又不得不去面对深藏心中黑暗的一面……

小沼真实（门胁麦 饰）曾经也是一个活泼开朗的女孩，但现如今，她成为大门不出二门不迈的家里蹲已经五年之久了。在这五年里，足不出户的真实一直都靠着临摹喜欢的插画作品来排解压力逃避现实。在父亲的介绍之下，真实终于鼓起勇气进入了一家游戏公司上班。然而，毫无社会经验的真实在工作中漏洞百出，做出来的游戏全是漏洞，本以为要被骂的她，却意外的得到了同事矢部辽太郎（三浦贵大 饰）的认可。辽太郎认为真实拥有绘画的天赋，在他的建议和鼓励之下，真实成为了游戏原画师，并且开始尝试不再模仿，去创造属于自己的独一无二的角色。

剧场版《BanG Dream ! Episode of Roselia Ⅰ :約束》公开先导影像，本作将于2021年在日本公开

"Carol Jeffries (known as 'Jeff') is a naive American woman staying in the Phillipines. She is given ten years in prison after being set up by her drug-dealer boyfriend, Rudy. She endures the harsh conditions, sadistic head matron and attempts on her life, then convinces her cell-mates to try to escape with her through the jungle, in spite of the knowledge that ruthless trackers will be sent out after them. ”“ Legend has it that Sam Arkoff, head of American International Pictures saw a statuesque Grier at his company switchboard and cast her on the spot for her breakthrough hit Coffy. That, as they say, is bull shee-it. The former beauty queen made her film debut in 1970 as an extra in Russ Meyer's big breast bonanza Beyond The Valley Of The Dolls, and appeared in a number of B-pics shot in the Philippines the following year for AiP's rival company, Roger Corman's New World Pictures. Alongside her role as the tough-as-nails prostitute in Big Doll House were supports in the horror flick The Twilight People and as a topless hooker (again!) in Cool Breeze, then back behind bars for Women In Cages.In Women In Cages, Grier plays the sadistic warden for once, a pot-smoking lesbian with a fully-equipped torture chamber (including a guillotine!). The 'New Fish' (a recent inmate, for you prison film novices), a ditzy blonde ex-stripper called Alabama, has taken the heroin possession rap for her pimp boyfriend. She knows too much, so the pimp blackmails her cellmates to execute her. A competent and well-shot entry in the tropical prison genre from Filipino director Gerry De Leon, it places the embittered ex-addict and prostitute Grier in the position of slave owner, watching her white charges toiling away in the plantation with obvious ironic glee."