As a last-ditch effort to win the war, the Diamonds set up a third kindergarten to try and get more troops onto the battlefield as fast a possible. After the Diamonds left, corrupting all the unprotected gems on the surface. Only a few survived, those protected by Rose Quartz and those who slept beneath the ground. This story follows a group of gems from the gamma kindergarten.

A "failed" experiment to create a new Diamond to replace Pink makes a group of gems known as the Carbons who fuse to create Synthetic Diamond. Follow their adventures as they argue with the other diamonds and deal with a certain pesky set of rebels.