Miku has brought her seriously injured younger brother, Taku, to a flooded city in a small fishing boat. In Submerged, her search for medical supplies takes her along submerged streets and up the sides of buildings to reach abandoned relief crates.
Played from a third-person perspective without combat, the game lets you explore at your own pace and use a telescope to search for supplies. Hidden objects reveal fragments of the city's history and the family's past, while wildlife inhabits the flooded ruins.