In Japan, a new drug called Golden Monkey has taken hold, causing chaos. This enigmatic substance not only provides users with endless energy, but also transforms them into dark creatures - ideal for warfare. In the animated science fiction series "Tokyo Dark Transformation", Haya strives to stop this catastrophe. 　　With the assistance of Soji, a troubled soldier on break from duty, the World Bank staff member embarks on a mission to eradicate Golden Monkey.