The government of the Central Asian Republic of Albenistan has given the UK's Special Intelligence Service permission to operate within its borders. The drug trade has moved into the mountainous, lawless region along the border Albenistan shares with Afghanistan. Players take on the roles of special military operatives working for the SIS' covert, direct action unit, the Increment. Sent to neutralize a drug smuggler's camp, the team runs into more than just criminals and opium.

Raid on Ashkashem is an adventure for 4 to 6 characters of levels 9 to 11 using the d20 Modern Roleplaying Game. This supplement can be used as a stand-alone adventure or as the introduction to the Albenistan Series. The Albenistan Series consists of three adventure supplements from SEP Spec Ops line. Raid on Ashkashem is followed by the Qalashar Device and the Khorforjan Gambit.