Wanna go where?

What are you going to do?

你打算做什么？ Number one, what's the purpose or intention behind your outing? Secondly, consider the context in which you're asking, as this might influence wording. Thirdly, the nuances of language, like asking directly versus subtly, can significantly alter perception or response.

Where are you destined to undertake your endeavors? In which direction do your intended pursuits lead?