"Fear doesn't come naturally to Mathilda Savitch. She prefers to look directly at things nobody else can even mention: for example, her beloved older sister's death. She was pushed in front of a train by a man who is still on the loose, and after a year of searching for clues, Mathilda has come no closer to the truth about Helene's murder ... until she cracks her email password and a whole secret life emerges -- one that swiftly draws Mathilda into her sister's world of clouded motives and strange emotions. If she can find the keys to Helene's past, she's sure she can wake her family from their nightmare of grief. But in crossing into that underworld and tracing her sister's footsteps, she has to risk everything that matters to her."--Jacket.