Netflix just unleashed a batch of new material on the upcoming second season of its drama series “13 Reasons Why,” including the official trailer, which you can watch below. The season unspools May 18.

Included in the new material is the cryptic message “Hannah wasn’t the only one.” Another message says, “The tapes were only the beginning.”

“Season 2 picks up in the aftermath of Hannah’s death and the start of our characters’ complicated journeys toward healing and recovery,” Netflix says in its announcement about the premiere. “Liberty High prepares to go on trial, but someone will stop at nothing to keep the truth surrounding Hannah’s death concealed. A series of ominous polaroids lead Clay and his classmates to uncover a sickening secret and a conspiracy to cover it up.”

The announcement promises that season two will answer “the big questions left hanging in the balance at the end of Season 1,” which it lists as follows:

• How will Jessica heal in the aftermath of her assault?
• Will Bryce be brought to justice?
• How will Clay move on from the devastating loss of Hannah?
• What happened to Alex?
• What choices will Tyler make in the face of his social isolation?

The series stars Dylan Minnette as Clay Jensen, Katherine Langford as Hannah Baker, Kate Walsh as Mrs. Baker, Derek Luke as Mr. Porter, Brandon Flynn as Justin Foley, Justin Prentice as Bryce Walker, Alisha Boe as Jessica Davis, Christian Navarro as Tony Padilla, Miles Heizer as Alex Standall, Devin Druid as Tyler, Annie Winters as Chloe and Tommy Dorfman as Ryan Shaver. It’s written, created and produced by Brian Yorkey, with executive producers Selena Gomez, Mandy Teefey, Kristel Laiblin, Steve Golin and Joy Gorman.

The announcement also notes: “In preparation for the launch of Season 2, new resources will be added to 13ReasonsWhy.info including an updated Discussion Guide and a new Discussion Series — a set of videos where cast address issues in the series including bullying, sexual assault and drug abuse.”

Here’s the trailer …