Sheppard resign

ok I'm want to reread the following story but i simply can't find...Due to an injury (i think in the shoulder) Sheppard is forced to go back to earth but after a while he found out that he won't get the full mobility of the shoulder so he can't go back to active duty...he resign and go to work with his brother...after several months there are problems in Atlantis so he go back to help but at the end he go back to earth.

thanks