Like the brilliant Nic Sampson has Fallen Down a Well from 2016, Unfinished Business is essentially a one-man show rather than a traditional stand up set.
The concept is as silly as you'd expect: a young Sampson failed to pass on a chain email in the early 2000s and the ghost of a dead girl is now coming to kill him unless he completes a series of tasks.
It's a sketch/stand up hybrid, a format which plays well to his strength as an actor (Sampson has appeared on the cast of several Kiwi shows including a recurring role in the Brokenwood Mysteries and Go Girls).
Sampson creates characters which are recognisable, like a blokey Kiwi guy, or a creepy little dead girl, but gifts them idiosyncratic quirks which prevent them being broad or lazy.
Our Kiwi bloke, for example, is a hand cream salesman but the joke isn't that this is a girly thing for a guy to do, it's that despite 'hand cream salesman' being an objectively stupid job, the guy really cares about it - even in the afterlife.