Two mismatched Hong Kong police detectives, Yau and Yue, were assigned to work undercover as a live-in couple to track down a serial killer accused of murdering adulterers. In the meantime, Yau (Anthony Chan) is coping with his girlfriend having left him, and Yue (Sandra Ng) is losing her boyfriend to a college girlfriend of his.
Unfortunately the movie Changing Partner is not yet available on HBO Max.
| Directing | Andy Chin | Director |
| Writing | James Yuen | Writer |
| Writing | Law Kam-Fai | Writer |
| Sound | Lowell Lo Koon-Ting | Original Music Composer |
