A possible translation would be "Où va-t-on ?". ie. "where do we go from here". Even if it would be technically correct to also use it in singular form "Où vais-je ?", nobody would say that. "Où va-t-on" (or, in a more formal way "Où allons-nous ?") is used both for "where do I go from here" and "where do we go from here".