The Campfire Ghost hunters are back in The Shallow End again. An abandoned town steeped in legends and ghost stories. Surviving a night in Blackfrost Cemetery, a Ragged School and The Wailing Woods full of various ghosts, they now find themselves in the underground vaults beneath the Northern Bridge. The vaults are said to be the most haunted location in the whole town and even Oliver Cross is afraid of the place. He has drafted in two new ghost hunters to help him look after the teenage ghost hunters as it's not a place he is prepared to leave them unattended. The underground vaults are filled with friendly ghosts and shady characters who are hiding out in the vaults. The night starts out fine but as the evening goes on, things start to go wrong and it is only the first night. They are spending the whole weekend underground. Will they survive until Monday?