Ranma, a compassionate but destitute private investigator, joins forces with his daring and affluent partner, Rella, in the perilous streets of Kirin Town. After a harrowing encounter with a mob boss leads to a life-threatening accident, Ranma awakens to find Rella missing. Determined to unravel the mystery, Ranma resumes his investigation only to discover a bizarre twist at midnight - a body switch with Rella. Now, as they swap identities daily, the mismatched duo races against time to reclaim their original forms. Despite their shared predicament, Ranma and Rella must navigate cases and combat the underworld's most treacherous criminals, all while struggling to reunite in their true selves.