Watch I Know What You Did Last Summer

Fear turns to paranoia as Lennon and her friends don't know if they can even trust each other. Bruce's secrets finally come home to roost. And everyone is forced to confront painful truths from the past as the deadly truth of the killer's identity is finally revealed.

With the Kani Kani festival around the corner, the police apparently solve the mystery, and as peace and quiet return to Wai Huna, our OG crew hope they've finally seen the end of the murders. The town publicly mourns all the victims and prepares for the annual celebration, but the calm is shattered as the killer attacks again. The crew realizes the killer is still out there.

Their mission to get evidence interrupted, the friends are forced to split up and each must scramble to escape the deadly compound on their own. But the next morning, they realize one of them is missing and now have to rescue one of their own. Meanwhile, Lennon's quest to find out more about her own family leads to a devastating revelation and estrangement from Bruce.

As the chief of police questions everyone in town who had any connection to any of the mounting murders, the reunited friends believe they finally know the identity of the killer. But they can't go to the police without proof. So, they venture out to the abandoned cult compound to hunt for evidence implicating the town eccentric. Margot falls into old habits, as Lennon and Riley grapple with their complicated feelings for Dylan. Bruce wonders about his own connection to the recent events and how they might be tied to his own secrets.

Lennon uncovers secrets about her twin and begins to fear the worst about the true identity of the person murdering her friends. The local community is shocked by more murders.

Unable to go to the authorities without revealing their secret, the crew needs to solve the mystery on their own. More bodies turn up, as they realize they're being haunted and hunted.

The estranged friends reunite to try and figure who might have revealed their secret or who else knows what they did - which leads to murder.

Lennon Grant returns home after her first year at college and discovers that someone knows the terrible secret she and her OG crew of friends swore to keep last summer.