인기 만화가 원작으로 이미 2003년 아사히 TV에서 드라마로 방영된 뒤 인기를 끌어 다시 극장판으로 제작되었다. 낮에는 실수 연발인 무능한 계장이지만 밤에는 회장 직속 특명계장으로 회사내에서 벌어지는 사건을 해결한다는 이야기.

Tadano is assigned by the chairman Kurokawa to protect and check the personal affairs of a young idol, Sylvia , who is the main character at the "Flower Earth Festival 2008" organized by Denodo. Sylvia has been threatened by someone to resign from the main character role. Tadano starts investigating while supporting Yamanishi, the event organizer. However, Tadano is struck down by a mysterious giant of a man. Yamanishi, who has obtained important information, is murdered, and Sylvia is kidnapped. Tadano realizes that Anzai, Yamanishi's right-hand man who has been eyeing the chairmanship, is the mastermind behind this. Tadano rescues Sylvia and brings her to the event venue.

柳沢きみおのコミックを高橋の主演で映像化した人気ドラマの劇場版。時系列的にはTV版のシーズン3と4の間に位置する物語。普段は冴えない窓際係長だが、実は会社の会長直属の特命係長という二つの顔を持つ只野の活躍を描く。いい意味で荒唐無稽なストーリーの痛快さ、高橋が見せるアクションや女性キャラ陣とのベッドシーンでのギャグすれすれの過剰表現など、ドラマ版の人気要素はいずれもパワーアップ。グラビアアイドルの秋山莉奈、医師タレントとして人気だった西川史子がラブシーンに挑戦したのも話題の的。