Explaining The Long Stretch Mission from GTA 5!

Explaining The Long Stretch mission from GTA 5. Franklin is about to leave the house, promptly to Lamar and Stretch walking up his path. Franklin isn't happy that Stretch is back, causing an argument between them. Lamar calms them down and they both tell Franklin they have some business to attend to. The trio head to Ammu-nation. On the drive over, Lamar tells Franklin about the business. Franklin is apprehensive about the deal but still tags along. They meet up with D, who has set up the deal. It ends up being a set-up, revenge for kidnapping D, back in the Chop mission. The three must now fight their way out of the plant as Ballas are now swarming the place. The shootout ends up setting the plant ablaze and the three escape the building.