Frankie Banister and his family are his family are preparing to celebrate Grandad abraham 175th birthday an occasion that's going to be even more now that abe ghost has showed up when unexpected spook reveals a secret hidden away for years the banister decide there's only one thing for it a whopping welcome home bash in the spectacular but memories aren't the only things waiting at the bottom of the ocean. Secrets and sea monsters are lurking in the shadows and it everything's as it seems with grandad Abraham's ghost or is there something fishy going on