This map is a KotH map that goes downhill, with a lot of small structures and cover walls scattered along the way. It also has a double-decker capture zone and some underwater tunnels.
BLU is building a water distillation facility so they can have some clean water. RED decides they also would like to have some clean water, so naturally they invade BLU's half-finished facility to steal it for themselves.
A downhill KotH map with various quirks, such as the two-story capture point