Nick chases Baron Samedi wildly across the container yard, dropping into a container after him. The Baron's cackle echoes around him. Flashlight swinging, Nick picks up a passport with his picture on it. He whips around after hearing a sound, only to have the deadly Baron morph and spit green poison in his face. A stunned, seemingly dead Nick is placed in a metal coffin with the fake passport.
Monroe, Rosalee and Juliette are trapped with zombies clambering all over the vehicle. Since stepping on the gas and careening through the container yard doesn't deter the horde of zombies, the three are forced to climb atop the highest containers. Juliette calls Hank in a panic and he immediately dispatches all available units to the overrun container yard.
Meanwhile in another shipping container, Captain Renard answers a ringing phone - it's Hank calling Nick! But where is the Grimm? Renard witnessed the attack on Nick and theorized his brother was behind it and would transport Nick to Austria.
In Austria, Adalind continues her attempts to regain her Hexenbiest powers. Stefania cuts out Frau Pech's heart and places it in a hexagon-shaped box to begin the Contaminatio Ritualis. For her part, Adalind must chop off Frau's hands and feet and pluck out her eyes. The two gather the bloody bits and bring them to a sacred poppy field.
Tossing the hexagon box high in the air, Stefania orders Adalind to dig where it lands with an ancient silver claw. Adalind labors over the hole and deposits Frau's extremities into it before refilling it by hand. When a fog immediately engulfs her, Stefania takes it as a sign that means she's "been accepted" - Adalind is once again a Hexenbiest.
A blacked-out van arrives at the airport lugging Nick's metal coffin for a waiting Baron. Just as he climbs onto the plane, two alerted police demand the airplane stay grounded - Baron drops them both with his poison. Captain Renard, Monroe, Rosalee and Juliette race to the airport just in time to see the Baron's plane take off.
On the plane, Baron Samedi is in for a nasty surprise - his poison has an entirely different effect on a Grimm. Nick punches through the metal coffin and the Baron realizes Nick, while clearly not in his right mind, will not obey him. Unable to get the plane under control, the distracted pilots crash it into the forest.
Back in Portland, Rosalee desperately brews the zombie antidote, but it's clear she won't have enough for all the undead. Suddenly, she has an epiphany - turn the antidote into a gas to "inject" them all simultaneously! Taking the reformulated medicine, Rosalee and Monroe throw the gas into the container full of corralled zombies. They wait until the noise dissipates, cautiously open the doors and discover the potion was effective. Portland is now zombie-free minus the missing Grimm...
Hank bursts into Captain Renard's office to inform him Nick's plane has been found near Mount Cedara. At the crash site, one pilot and Baron Samedi lie dead in the wreckage. They receive a call from local authorities that a full-fledged brawl has broken out at the nearby Tippy Canoe bar. It's apparent that Zombie Nick has been there, as evidenced by the mass of bodies lying around the bar. Monroe sniffs out Nick's trail, but he must be found before he begins killing...
Season 3 returns with rampant zombies and an undead Nick wreaking havoc on Oregon.