Niki Herzog is ready to start her new job, the day before she meets a great guy - things are looking good. The next day Niki arrives at work to see her new co-worker (and superior) is none other than the guy she met the day before - Marc Hoffman. It isn't long before they get their first case to work together on - but Rex is still suspicious.

Late at night extreme climbers risk their lives to climb up the side of a building, the Vienna Town Hall. From the ground they watch as one which is climbing appears to lose his grip and falls to his death. When Marc and Rex investigate though they find that none of the witnesses are willing to talk.