She vanished mid-note. He became suspect number one." "One second Eliza was playing; the next-poof! Gone." "And somehow, I'm the prime suspect," Ben muttered. "Well," Isabel teased, "your boarding pass matched her cabin. Awkward." "I'm innocent!" "Prove it." "Fine.

Let's dive for clues." "Dive?" "Shipwrecks hide secrets, Isabel. And treasures." "Great," she sighed, grabbing Mimi. "Another treasure hunt." "Hey," Ben smiled, "at least we're consistent." "Consistently in trouble, you mean." "True-but at least it's exciting.

" And dangerous, Isabel thought, gripping a mysterious map. Because someone would do anything-even kidnap-to possess what's hidden beneath the waves.