I'd much rather know, but then again, not-knowing keeps all the possibilities open. It keeps all the worlds alive.
A woman in Canada finds a diary by a teenaged girl living in Japan washed up on the shore along with some family heirlooms. She reads the diary, and although the two never meet, their lives seem to become entwined with each other... and, at one point, the woman finds herself wondering if she is a creation of the girl's pen. "Agency," as one of the characters says, "is a tricky business."