The Change of Life (cover coming soon)

In a lovely creek, near a lake, which leds to a city, there was a family of 5, which one of them is "missing". They are the Oranges, being three kids named Victoria, Lenny and Brooke, and their mother named Katy. At first, they live in a nice wooden house. But later on, Lenny discovered the city, hence the title. But unfortunately, one person knows their secret but everyone else doesn't believe her. The only way for them is to learn how to... Use their powers?