From publisher blurb:
The Silver Box is a d20 adventure, playing in the world of the Iron Kingdoms designed for four to six characters of levels 4-5.
With Khadoran forces entrenched within the once proud nation of Llael and Cygnar pressed to defend her own borders, the forces that once policed these proud nations have all but disappeared. Even in Ord, who has yet to act in the war that is rapidly sweeping Immoren, the roads have become a dangerous place to be caught unprotected. With war nearly on all fronts, the Mercarian League and the Mateu Merchant Houses’ rivalry has reached all new heights. This competition has prompted both parties to secure Letters of Marque from Cygnar, thrusting them into a battle for many of the trade routes used throughout western Immoren. In doing so, both parties have taken to raiding one another’s vessels and have recently discovered a dangerous Cryxian item in the process...