Charlie, Alex, Liam, Norah, and Bella are done with their exams...they meet their friend jack and are back to Greenland...and guess what ....... They got a new case...... What was in that piano ???? Reading newpapers and finding new cases in Rome....was their main interest..... They r THE DETECTIVES OF GREENLAND !!!! But this time there was something uncertain happening.... this mystery will be unpuzzled soon.... TO CATCH THE TWIST WAIT FOR PART 5All Rights Reserved