Gawky teenager Joan Girardi (Amber Tamblyn), who has recently moved to Arcadia, Maryland with her family, suddenly starts meeting with strangers who claim to be God in human form, and who give her incomprehensible tasks. Each task seems to have "good ripples" (as Joan puts it) and she is willing to undertake more of them, but mysteries remain. Is Joan delusional? Or the victim of a huge practical joke? If she really is dealing with the deity, why did He pick an unpromising girl to do His bidding, and what are His plans for her?

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