Zomboat!

Sisters Kat and Jo realise there's a zombie apocalypse in Birmingham, but gamer Kat has a plan: zombies can't swim - water is the safest option, and narrowboats move just marginally faster than zombies. Jo is unconvinced, until Jude, the guy she just slept with, turns into a zombie. Meanwhile, Amar and Sunny have been in Birmingham for a stag. When all trains back to London are cancelled and they're attacked by a train guard zombie, they flee. Kat and Jo narrowly escape zombie Jude and set sail on Jo's ex-boyfriend's narrowboat. Unbeknownst to them, Sunny and Amar are hidden in the boat's toilet.

Kat and Jo want Amar and Sunny off the boat. Jo is upset about ex-boyfriend Rob and decides to get her phone to call him. Amar joins her, determined to find a car. Kat meets her online gaming idol, BigDameHero, and doesn't listen to Sunny's words of warning. When she turns into a zombie, Kat realises Big is actually a liar and her nemesis. Amar helps Jo out of a zombie pile-up. They arrive back to find Sunny overboard, and Kat killing BigDameHero. Kat and Jo accept that perhaps Sunny and Amar can stay on the boat after all.

The gang arrive at the hotel where Sunny and Amar spent their stag weekend. Amar insists they check if their mates are alive, while Kat makes Jo stay and guard Dorothy. In the hotel, they realise the groom is still tied up on the roof. Sunny admits to Amar he hated the stag weekend, while Amar reveals Sunny was a drunken nightmare. Meanwhile, Jo sneaks into the hotel for a shower, endangering the boat. Meanwhile, the others are cornered by zombies on the roof...

Amar and Jo go to the supermarket where Jo used to work. Meanwhile, Kat realises the canal is draining and she needs to get Amar and Jo back, and Sunny admits that he is scared of the dark. Jo and Amar are trapped with Chloe, Jo's old colleague before Amar accidentally unleashes Jo's old (now zombie) boss. Kat arrives but soon gets trapped too. Chloe idolises Jo, so when Kat accidentally reveals that Jo cheated on a work competition, Chloe becomes dead set on revenge.

Kat worries about sharing a kiss with Sunny, with Zombie Jude still on their tail. Meanwhile, the gang encounter another boat, which Jo decides to stay on to avoid Kat's bossiness. However, when Jo crashes the boat, Jude attacks.

The gang are taken to the local evacuation centre, but Kat doesn't trust the government. While there, Jo sees Rob and kisses him. He needs to find Patient Zero - Jude, the zombie Jo just killed. Zombies attack and Kat, Jo and Rob escape, separating them from Sunny and Amar. Kat sees Jo's been bitten, but is shocked that she shows no zombie symptoms...