Mermaid (2007)

Once upon a time a girl named Alisa (Mariya Shalayeva) lived by the sea. She let life carry her along, never struggling, always adapting to changing conditions and historical events. The only unusual thing about Alisa was her gift of making wishes come true. When she found herself in metropolitan Moscow, chance took her by the hand and introduced her to a man with a cross on his chest that read "save and protect". Alisa took one look at the man, and her life changed forever.