Nancy and her friends head to a popular resort and wildlife preserve to study three species of monkeys. But when they arrive, they find the whole place in a mess and very few monkeys. Can Nancy figure out what's going on?

Bess, George, and I volunteered to go to Costa Rica for some R&R: rest and research. See, Corcovado Ecologica, a popular resort and preserve, isn't only a beautiful getaway; it's also a great place to study three species of monkeys. Or so we thought.

When we arrived on the scene, we found the place in a shambles, and the monkeys were few and far between. And if the problem gets worse, the resort's going to be in trouble. Clearly my friends and I won't have much time for "monkeying around" on this trip -- we've got a case to crack

To be updated