Disney+ is previewing the sophomore season of Percy Jackson and the Olympians, which arrives on the streamer Dec. 10.

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A trailer released Thursday at San Diego Comic-Con shows Percy (Walker Scobell) and Annabeth (Sava Jeffries) getting ready to face a "sea of monsters."

Season 2 is based on the second book in the Rick Riordan series, and follows Percy's quest to find Grover (Aryan Simhadri), a press release states.

"With help from Annabeth, Clarisse (Dior Doogjohn) and his newfound cyclops half-brother Tyson (Daniel Diemer), Percy's survival is crucial in the fight to stop Luke (Charlie Bushnell), the Titan Kornos and their impending plan to bring down Camp Half-Blood -- and ultimately Olympus," an official synopsis reads.

Riordan, who also created the show, said via video message at Comic-Con that Levi Chrisopulos will portray Nico in Season 3, while Olive Abercrombie will portray Bianca. The characters are the demigod children of Hades.

Production on Season 3 will begin soon.