Welcome to a world where everyone over the age of 18 develops a superpower. Everyone except for 25-year-old Jen, who feels like she’s being left behin…
After a disastrous job interview where she reveals her lack of a superpower, Jen seeks solace in regular hook up and fly-boy, Luke. Taking in a stray cat, he's christened Jizzlord after an unfortunate incident. Flatmates Carrie and Kash are mugged, inciting Kash to create a plan for a vigilante group. Lack of money makes Jen realise she will have to discover her power by herself.
The gang attempt to draw out Jen's power by manufacturing stressful situations. Carrie tries taking her to the dentist, but it fails when Jen receives a dose of Valium. Kash goes for a more dramatic approach and kidnaps Jen, which backfires and they are forced to call upon a smug Andy to help out. Jizzlord transforms into a man but no one is there to see before he shifts back again.
Kash sends a semi-feral Jizzlord outside whilst he assembles his vigilante group. A slick record executive invites Carrie to channel a dubious dead musician. It could be a huge money-making scheme but Carrie's nervous. She calls Jen who sees the opportunity for career fulfilment. When Kash's vigilante meeting proves to be a muddled disaster, he is surprised when it's Jizzlord who comes to his rescue.
Jen and Jizzlord try to discover who Jizzlord used to be, but multiple paths lead to dead-ends. A trip to the vet seems promising, and they get information from an old enemy from Jizzlord's cat days. As the trail grows cold, Jizzlord worries he may not like the human he was. Carrie's frustration with Kash's vigilante group grows, and she considers getting in touch with Gordon to utilise his power, but worries it would be equivalent to cheating.
Jen is dragged back to her old school for Andy's prizegiving, who is receiving the top prize. Carrie has been invited to speak. A brush with their old school bully (now teacher) Rebecca, forces Carrie to revaluate old moments with Jen. At home, Jizzlord tries to comfort a despondent Kash, crushed by his failure with the vigilantes. Jen uncovers Andy's secrets but her plan for humiliation hurts Carrie as much as Andy.
Jen makes a new powerless friend called Hannah at the power clinic, leading to a night of drunken debauchery. However, Hannah has less in common with Jen than she believed, and the friendship is short-lived. Carrie marks her territory around the flat, labelling all of her possessions that Jen is forbidden to use. Jizzlord is forced to mediate between the girls. Kash begins the arduous process of apologising to his vigilante group.