<DIV>Dr. Mac has brought Brenna, Maggie, and Zoe to Florida to visit her friend Gretchen, a marine biologist who runs a manatee rescue center that?s in desperate need of money. Brenna?s immediately drawn to the endangered, gentle giants, and wants to do whatever she can to help them?and the center. But is she causing trouble where she wants to help?<BR><BR></DIV>