A hard-working young actress with a small theater company, Kate lands her first leading role on her 23rd birthday. When she reads a cheerfully inquisitive birthday letter from her 13-year-old self, it seems she might actually be fulfilling childhood aspirations. But the letter triggers mounting confusion for Kate, and her former self--in the form of a voice and the occasional fleeting vision--won't seem to go away. As Kate bends to the whims of those around her with dwindling resistance, the protests of her adolescent self grow more hauntingly intrusive until, in a surrealistic turn, 13-year-old Katie appears in the flesh, primed for a confrontation.