The end of Season 3 left our Killjoys scattered to the far corners of The J galaxy and beyond. Dutch is on a journey to face her biggest foe yet, while D’av and John are trapped in an elevator in deep space with a pregnant Delle Seyah. They are united by the knowledge of the name of their true enemy: The Lady, an immeasurable manifestation of evil without beginning or end. The Lady is making her play, and our trio has something she wants.
Trapped in the mysterious and mind-bending greenspace and on the run from the deadly Lady, Aneela, and her father Khlyen struggle to stay one step ahead of the Lady, while keeping a wounded Dutch alive with a story that he promises will save her life: the tale of Dutch and Johnny’s first mission in the Quad. He tells the story of the time when, down to their last few Joy, Dutch and John accepted a simple cargo transportation gig to the armpit of the galaxy and how this led to them facing off with a deadly assassin.
With criminals chasing an injured Johnny, D’av and Delle Seyah take drastic measures to save him.
Chased by a murderous posse, the new John tries to manipulate D’avin into helping him find a green plasma pool, while the abandoned Delle Seyah matches wits with the prison planet’s warden and the RAC’s rescue team’s efforts hit a deadly roadblock when a steadfast ally seemingly turns on them.
Delle Seyah’s impossibly complicated delivery, John on the brink of madness, Dutch, staggered after being trapped in another dimension. Things are not exactly quiet on the good ship Lucy. Nor are they back in the Quad where our Killjoys are learning what comes of turning your back on sleeping Hullen.
With D’av’s newborn son’s life on the line, the trio take desperate measures to save him.
Team Awesome Force faces off with a relentless, deadly assassin whose arrival is triggered by their examination of the memory Khlyen altered in Dutch’s mind. While Pree searches for his missing husband on Westerley, Zeph struggles to save Pip from an unexpected medical complication.
With D’avin having left, Dutch and John are left to follow the hidden pulsar in Khlyen’s mysterious story that leads them to discover an unexpected past – including the origins of the assassin.
In what has to be the worst family reunion, D’av, John, their father Marris and Jaq find themselves pinned by a silica storm in the family bunker as they fight off Hullen operatives hell bent on capturing Jaq for The Lady. Dutch risks her life in order to uncover the secrets of the spore.
Team Awesome Force sneaks onto the RAC to rescue Westerly’s stolen children. Zeph and Pip grow closer.
Dutch braces herself for a final confrontation in greenspace in an attempt to stop The Lady from breaking through into the Quad and the rest of the universe. Back in the Quad and buried in her work, Zeph makes a horrifying discovery of a threat to all of Westerley.