Undercover Cave

So I am going undercover into our Junior High trying to get information on a group of teens that are running a huge crime lab. They figure me out, so I ended up in this huge cave on this island and I keep going deeper and deeper into the cave cause they are after me and I end up in this big bedroom in the cave. Then the tide rises and they have to leave but I am high enough to be safe from the water and they do not know where I am. So I come out the next day and see a whole group of people making repairs that were cause by the damage done by the tide, and I realize that this group of people is not just a few but a ton. So I have to try again to get into the group so I was going to change my look.