Katie's world is shattered by the news that her headstrong, bohemian younger sister, Mia, has been found dead at the bottom of a cliff in Bali. The authorities say Mia jumpedthat her death was a suicide. Although they hadn't spoken since Mia suddenly left on an around-the-world trip six months earlier, Katie refuses to accept that her sister would take her own life. Distraught that they never made peace, she leaves behind her orderly life in London and embarks on a journey to find the truth. With only the entries of Mia's tattered travel journal as her guide, Katie retraces the last few months of her sister's life, gradually uncovering the mystery surrounding her death.