It is a typical day in the life of Ivor the Engine. Ivor delivers Coal to Grumbly Gasworks, tomatoes to Mr Davy and Fish to Mrs Thomas. Ivor also goes to choir practice.

Jones and Ivor bring back a package, which is supposedly a hat for Mrs Porty, but Jones and Dai discover it's a new telescope cover for Professor Longfellow and go home for the night. In the morning, the package has gone...

A silly sheep has got itself stuck on a ledge in the hills. Jones tries to rescue it but ends up stuck himself. He ends up sending Ivor and Old Nell, the sheepdog, to get help.

Ivor has to deliver some pigeons to Mr Brangwyn. Thanks to Evans the Song, they end up escaping and on Miss Pryce's roof, with some amusing attempts to get them down.

Going past Smoke Hill, an extinct volcano, Jones and Ivor spot smoke coming from the top. Jones discovers a fire inside the hill and a strange egg. He puts it in Ivor's firebox to keep it warm. Mr Dinwiddy doesn't have any idea what it is so they go off to choir practice. During the practice there seems to be a voice coming from inside Ivor.

Dai Station isn't too pleased about Ivor's new friend, Idris, travelling in his firebox. He orders him into a box, which catches fire and then scares him off trying to extinguish it.