Season 4 of Game of Thrones will be a very eventful one for the series, with many deaths and shocking plot developments.

Game of Thrones season 4 will feature the plot of the second half of A Storm of Swords, the third novel in George R. R. Martin's A Song of Ice and Fire book saga. So much has already happened in season 3, which was an adaptation of the first half of A Storm of Swords, but the action will increase exponentially in season 4.

Game of Thrones fans who are impatient for the fourth season of book readers who want a refresher on what will occur can read onward.

MAJOR BOOK/SHOW SPOILERS AHEAD:

Perhaps the most significant development ahead for season 4 occurs at the wedding of King Joffrey Baratheon (Jack Gleeson) and Margaery Tyrell (Natalie Dormer). Things go horribly wrong after Joffrey takes a swig of his wine and realizes that it has been poisoned. Joffrey dies from the poison and his mother Cersei (Lena Headey) immediately blames Tyrion (Peter Dinklage).

Tyrion is ultimately imprisoned and tried for the murder of Joffrey. This ultimately leads to a trial by combat, with a new character called the Red Viper (Pedro Pascal) subbing in and representing Tyrion. Unfortunately, things go horribly wrong in this combat but Tyrion is able to escape King's Landing with the surprise help of Jaime (Nikolaj Coster-Waldau).

Game of Thrones Season 4 Spoilers: Tyrion Will Face 'Humiliation' in New Episodes as Starks Grow Stronger

On his way out, Tyrion kills his father Tywin (Charles Dance) as revenge for a past wrongdoing.

Meanwhile, at the Wall, Jon Snow (Kit Harington) helps lead the Night's Watch in a battle against Mance Rayder (Ciaran Hinds) and the wildlings. Luckily, Stannis Baratheon (Stephen Dillane) swoops in with his army and helps defeat the entire army minus Mance, who he keeps as a prisoner.

Across the Narrow Sea, Daenerys Targaryen (Emilia Clarke) continues to gain power having already conquered the cities of Astapor and Yunkai. With her army, Dany easily conquers the city of Meereen, but soon realizes that the city has a problem. A terrorist group called the Sons of the Harpy begin killing the citizens of Meereen, causing Dany to team up with a local named Hizdahr zo Loraq (Joel Fry), who promises to fix the problem. In exchange for keeping the city safe for 90 days, Dany has to marry Hizdahr.

Finally, a presumed dead character will reveal herself with a new identity. Catelyn Stark (Michelle Fairley) died in the Red Wedding in season 3, but she will come back with a vengeance as Lady Stoneheart.

Game of Thrones season 4 premieres Sunday, April 6 at 9 p.m. on HBO.

Watch the Game of Thrones season 4 trailer here: