Boom... pew pew... Zaeed Massani here!
After you take a mail from Illusive Man that mentions he hired one of the galaxy most badass bounty hunter for your mission, you will go to Omega to pick him up. After you make a little conversation with Zaeed he will ask your help for his revenge mission. This is a one hour long DLC and has a plain story, has not much memorable moments. You will make only 1-2 decision (which are cliché) while you are helping Zaeed Massani on his mission. During this mission you will blow up many things face against a lot of enemies, find new upgrades, also you will find a new heavy weapon, a flame thrower, which will burn down armors very fast.
The Price of Revenge is a fun DLC that you can blow up things and kill some time, don't expect much just enjoy. And one last thing if you are going to beat Mass Effect 2 at "Insanity" difficulty, Zaeed and Moridin is the best two squad members that I can suggest you with their area effective armor burning abilities against armored crazy husks at the derelic reaper quest.