According to this topic: http://www.grimdawn.com/forums/showthread.php?t=26777, there is 28 shrines in Normal/Veteran difficulty. I found 27 shrines and can’t fine last one. I’ve already restored quest shrine in Asterkarn Valley (Rhowari Legacy).
You are missing the shrine in tomb of the archon, just a little south east to fort ikon. Just before you enter the final area for the boss, the gate, there is a unlit torch on the wall to the right of the gate.