Amar and Jo go to the supermarket where Jo used to work. Kat realises the canal is draining! She needs to get Amar and Jo back. Sunny admits that he is scared of the dark.
Jo and Amar are trapped with Chloe, Jo's old colleague. Amar accidentally unleashes Jo's old (now zombie) boss! Kat arrives but gets trapped too. Chloe idolises Jo so when Kat accidentally reveals that Jo cheated on a work competition, Chloe wants revenge. They're about to escape, but Chloe locks them in – payback! But Sunny gets over his fear of the dark and rescues them.