Early on a windswept wintry morning in February, after diligently completing her pre-work three-mile swim across a frigid Buzzards Bay, in Massachusetts, Dina Pandya was stripping off her wetsuit when, from the depths of a cloth bag she had discreetly concealed in a clump of faded driftwood on Old Silver Beach, her phone buzzed. It was a message from outer space.
Her sister had news.
