Masquerade Night is a gripping Japanese crime movie that follows the investigation of a murder that takes place during a mysterious masquerade night. The story revolves around a group of individuals who find themselves trapped in a grand mansion as they desperately try to uncover the identity of the killer. As the night progresses, secrets are revealed, alliances are tested, and the tension rises, leading to a shocking revelation that will leave audiences on the edge of their seats.

When a series of murders occur in a prestigious hotel in Tokyo, a newly hired Hotel Detective and a skilled female hotel employee join forces to solve the complex case before more lives are lost. As they navigate through the dark secrets and hidden agendas of the hotel guests and staff, they uncover shocking truths that will change their lives forever.