Dai has a plan. Jones is to leave Ivor on the siding above Grumbly - as he did the day before yesterday - to find out what has upset him. They carry out this plan and discover that Ivor wants to sing in the Grumbly and District Choral Society. Sadly, when they have a word Evans the choirmaster he tells them that Ivor's squeaky little whistle wouldn't do for the choir.
