Martha Glimmer, and two brothers Trevor (Trout) and Eli Mcgill (Eel) are good friends. People of Oak Grove gossip about the brothers because they have webs between their fingers. At school, some kids bully them but the brothers don’t care about it.
Trevor and Eli found out that their mother was a mermaid. That's why they have webbing between their fingers and toes.
The town was getting flooded again and many kids were in trouble so Martha, Trevor, and Eli helped the kids that were in the water even if they were the same kids that bullied the brothers because of the webbing between their fingers and toes.