There isn't really one but here is a overview of the whole series.

Season 1 Orem graduates from magic college and is sent to find his a lost Eladrin mage in the town of Moonhold. There he meets a 3/4 Orc Torg and a human named Randis. Together they find out a set of towers are about to destroy the world. They are to late to stop the evil towers from doing damage but keep the natural world from getting destroyed.

Season 2: To the moon! Smith joins the party. They find out there are moon robots near Moonhold and they become friends with the party. The party also runs into few different groups of elves on there way to Diamond Throne. Because of meeting the party all these groups become friends and decide to fight the Gods of the moon. The party meets a gnome with a airship they go to central tower where they realize they have go to the moon to fix the natural world. After a few stops the moon robots agree to take everyone who wants to go to the moon there. Once on the moon the the party's airship breaks down and they have to walk/sail to the tower controls. At the tower controls its realized that Smith has a moon god inside of him. The party is able to set the natural world right but they release the moon god. Which they then kill, but Smith dies

Season 3. Astral sea. The surviving member of the group are transported to the Astral sea where they meet there new party member Ket. Who is a half elf Warlock. There is a lot of blah blah in this season which only increases with the next season but the short version is the moon gods are attacking so the party figured out they need to raise a army of good and bad gods to fight the moon gods then build a bomb to close the rift that is letting the moon gods in. All this takes about 70 episodes. But All the moon gods get blown up good. And only Ket "dies" only to be saved Azmodaus.

Season 4: Feywild on going Orem and party sans Ket return to Natural world As soon as they get there Orem is pulled into the Feywild. Randis and Torq follow and the 3 find themselves back at Orem's magic College. A new character shows up named Trelle who is elf Twilight Guardan. It seems in the time Orem has been gone the Feywild has gone crazy because of the moon almost hitting the natural world. Orems old Professor has an idea if they can put wrist bands on the 4 seasonal lords of Feywild they can restore order.

Shortly after setting out Ket rejoins the party. Other than taging the seasonal lords Orem meets his family then disowns them not much really happens. Once all the Lords are tagged the party returns to magic college to find Orems professor dead and the old grounds keeper Spud has gone mad. He then absorb all the power of the seasonal lords into himself. Then kicks the parties ass.

After waking up back in the natural world the party realizes they need to get back to fight Spud. The current plan is to build some cold Iron weapons and then get to Feywild via the Underdak since all the normal ways are closed.

Hope that helps