The plot is about a tiara that is stolen and not given to the people who would like it for selling. Lots of chasing around, speaking to different people to find out who wants it, and why they want to keep it and who is hiding what, where is it and what are you doing?
This is not very hard to follow, despite the shananigans that occur. The main characters never really encounter desperate situations, and are always hanging around together. I feel this is a slight disadvantage to the film as much more tension could be created by using their relationship.
However the romantic entanglement means they need to spend all non action parts forwarding the relationship, so it would have been tricky.
There is nothing essentially wrong with the film, in terms of bad production, it just doesn't have a very big impact. I never felt that the outcome was ever in doubt.
I didn't mind spending 90 mins watching this, but being a bloke perhaps that had something to do with the female lead.