The Hobbit: The Desolation of Smaug

Following their battle with Azog and his Orc party, Thorin Oakenshield and his company are ushered by Gandalf to the nearby home of Beorn, a skin-changer who can take the form of a bear. That night, Azog is summoned to Dol Guldur by the Necromancer, who commands him to marshal his forces for war. Azog delegates the hunt for Thorin to his son Bolg.
After telling the company about the dangers of Mirkwood, including the Necromancer's rise and the Wood-elves being dangerous, Beorn escorts the company to the borders of Mirkwood, where Gandalf discovers Black Speech imprinted on an old ruin. This, and a prior request by Galadriel, prompts him to investigate the tombs of the Nazgûl. Before leaving the company, he warns them to remain on the path. They lose their way in the forest and are ensnared by giant spiders. Bilbo frees the dwarves with the help of the invisibility ring and begins to understand its dark influence when he drops the ring and brutally kills a giant centipede to retrieve it.
The remaining spiders are killed by the Wood-elves led by Tauriel and Legolas, who capture the Dwarves and bring Thorin before their king, Thranduil. Thorin confronts the king about neglecting the Dwarves of Erebor following Smaug's attack 60 years earlier and is consequently imprisoned with the other Dwarves. Having avoided capture, Bilbo helps them escape in empty wine barrels sent downstream. They are pursued by Wood-elves and ambushed by Bolg and his Orc party, resulting in a three-way battle as they rush down the river in the barrels. The Dwarves escape both groups of pursuers, but Kíli is wounded with a Morgul shaft. Thranduil seals off his kingdom when an Orc captive reveals that an evil army is amassing in the south, but Tauriel decides to leave and assist the Dwarves, and Legolas goes after her. Gandalf and Radagast investigate the tombs of the Nazgûl and find them empty. Gandalf discovers that the Nine have been called to Dol Guldur, deducing that Sauron has returned and is preparing for war.
The company is smuggled into Esgaroth by a bargeman called Bard. Thorin promises the Master of Laketown a share of the mountain's treasure, and they are given arms and sent off to the mountain. Due to his injury, Kíli is forced to remain behind at Bard's home, tended to by Fíli, Óin, and Bofur. Bilbo discovers the hidden entrance in the Lonely Mountain and is sent inside to retrieve the Arkenstone. However, he accidentally awakens Smaug, who reveals his knowledge of the dwarves' plot.
In Laketown, Bard, a descendant of Dale's last ruler, prepares his ancestor's last black arrow in fear of an attack by Smaug, but is arrested by the Master. Bolg and his Orcs infiltrate Laketown and attack the four Dwarves, but Tauriel and Legolas arrive to defeat them, while Bolg escapes.
Meanwhile, Gandalf enters Dol Guldur alone after sending Radagast to warn Galadriel of their discovery at the tombs. The Necromancer overpowers Gandalf and reveals himself as Sauron. Gandalf is captured, as he watches helplessly as Azog and an Orc army march from Dol Guldur towards the Lonely Mountain. Inside the mountain, during a long chase, Bilbo and the Dwarves rekindle the mountain's forge using Smaug's flames and melt a large golden statue, hoping to bury Smaug alive in the molten gold. They do so, but Smaug emerges from the gold, stumbles out of the mountain and flies off to destroy Laketown as Bilbo watches in despair.