The Siren's Treasure

It was just supposed to be a regular day on the sea for Captain Cassandra, captain of the infamous "Phantom" ship. But that sunny day had been anything but normal. Cassandra had seen much through the years on the open seas, but no one, nothing could prepare her for what would happen that morning. A lone siren. That would have been enough to raise suspicion; they usually travelled in dolphin like pods, but this siren carried a wood box gilded in gold. Treasure, Cassandra was sure of it. But when Cassandra and the crew hauled the siren to the deck and pried the box from her cold dead hands nothing could prepare any of them for what was actually in that box.