Holocrons were stored within the Holocron Vault, located within the Jedi Archives of the Jedi Temple on Coruscant. You're a Jedi Master and been granted access to the Holocron, Plo Koon informed you that he brings a weight gain holocron to you as a gift, you thanked him and the clone wars nearly ended. you head back to the council room. since other masters are gone. execute order 66 has begun.