"Game of Thrones" season 4: Watch the new trailer

April is getting closer and closer, which is great news for "Game of Thrones" fans.

The new season debuts April 6, and HBO has just released a new trailer teasing what's to come.

This season is based on the second half of "A Storm of Swords," the third book in George R. R. Martin's "A Song of Ice and Fire" series. Here's how HBO's recently-released official description of the series describes what's in store for the likes of the Starks, Lannisters and Daenerys Targaryen (and her dragons):

"Encouraged by the Red Wedding slaughter in the Riverlands that wiped out many of their Stark nemeses, the Lannisters' hold on the Iron Throne remains intact...but can they survive their own egos, as well as new and ongoing threats from the south, north and east? While an unbowed Stannis Baratheon continues to rebuild his army in Dragonstone, a more immediate danger comes from the south, as Oberyn Martell, the Lannister-loathing 'Red Viper of Dorne,' arrives at King's Landing to attend Joffrey's wedding to Margaery Tyrell, and perhaps act on an ulterior agenda. In the north, a depleted Night's Watch seems overmatched against the inexorable Wall advances of Mance Rayder's army of wildlings, which in turn is being trailed by an even more formidable foe: the undead White Walkers. As if that weren't enough, Daenerys Targaryen, accompanied by her menacing trio of dragons and army of Unsullied, is poised to liberate Meereen, the largest city in Slaver's Bay, which could ultimately provide her with enough ships to sail to Westeros and reclaim the Iron Throne."

The fourth-season premiere, titled "Two Swords," airs April 6 at 9 p.m. ET on HBO.