Yu Yu Hakusho: Poltergeist Report

In the realm where spirits dwell, an unexpected downpour leads to the unprecedented flooding of the River Sanzu. Aware that this calamity signals the approach of a formidable enemy, Lord Koenma acts swiftly and sends Death God Botan on a vital mission: delivering a mysterious artifact to Spirit Detective Yusuke for safekeeping. Arriving weak from her journey, Botan is unable to offer any explanation or context. Consequently, Yusuke and his companions find themselves plunged into darkness concerning their imminent adversary. However, the ominous silence does not last long; soon enough, they are thrust headlong into an intense battle for Earth's fate as Spirit Detectives stand against the mighty ruler of the Netherworld.