Considering the Inn, Am I wrong for wnating to use the old GM's standby? Options

[LurkerOutThere]

So lately i've been working on a steampunk setting and the kitbashed rules to make it run. I've been looking at the list of pre-gens i've got written up and at least basic notations on their possible background and how it migh shape their worldview. Looking at the list of characters I've got I've decided that the only place I could account for all of them potentially being during the kick off events is common house/inn.

Currently the premise is this: The characters are at the inn either because their staying there or because they have stopped in for a drink or to conduct business or the like. While there a mysterious figure stumbles in requesting with their dying breath that the character protect the package he leaves with them. At that point pursuers enter and attempt to kill all the PC's for being in the wrong place at the wrong time. During the course of the fight it is my intent the package will come open revealing it is a sword. Investigation of the sword afterwards will reveal it is lost sword of the imperial dynasty. A powerful relic that most of the factions in the city would gladly kill to posses.

Is this too cliche? Keeping in mind that not all tropes are bad is it too troperific?