When the mermaids reached out to pirate captain Diana with an offer, she was initially reluctant to accept it. Treasure sounded nice, but one had to be alive to enjoy it, and what the mermaids needed from her could prove quite a deadly task.
Everything went better than she could have hoped for, and she did the task they asked of her, and then the time for her reward came.
There was treasure aplenty, but there was also another reward, one of a more personal nature, and Diana didn't hesitate much before accepting it. What came after