Brief of the opening sequence exercise

We have been asked to produce a 2 minute opening sequence for a thriller film, including titles.
Our sequence must include titles throughout, some form of copyright-free soundtrack, including fx, evidence of understanding of continuity editing, clear generic signifiers through character, action, mise-en-scene, dialogue etc.
Our sequence should be based on a single narrative event or idea, only a few characters and one location ideally. 
It should be clear who the target audience is and we should avoid anything too complicated, making a film sequence that only targets us and lots of confusing cross cutting, flashback etc.