An ocean-related Trouble brings the crushing pressure of the depths to Haven, while Audrey and Nathan discover that the residents' Troubles are mutating.
Audrey and Nathan go after a Troubled who can enter people's dreams, while Duke hunts down his brother.
While the mystery of Lexie continues, she helps Nathan and Duke try to find a Troubled person who can petrify their victims.
An old wolf pack mate of Dyson appears out of the blue and needs Dyson's help recovering a stolen Mongolian Death Worm. Bo and Dyson team up once again amidst complications that force Dyson to reconcile with his past and all the mistakes he made.moreless
In the aftermath of the school shooting everybody is talking as they need to get some closure over what happened, but, Sean, who thinks he has everything under control, may not be as well adjusted as he thought, and may have to take a trip back home to confront his past. Meanwhile, J.T. and Danny have shut Toby out for making friends with Rick, leaving Toby with no support to deal with his grief.moreless