It was a misty, moonlit night on the Island of Sodor, and James was puffing slowly down the line as he delivered the mail.

"Leave it to Percy to break down tonight of all nights," he muttered. "He knows how much I hate running through the mist, especially at night."

"You can complain back at the sheds," his driver chuckled. "Right now, we need to make up for lost time."

James sighed and rattled down the line. "At least the signal is green."

But what James didn't know was that the points were stuck, and were headed towards an abandoned branchline. The red engine chuffed on through the night.

Soon, James came upon an old viaduct. Vines wrapped around its arches as it stretched on into the night.

"Driver," James said, trying to sound brave. "I don't think this is the way to Peel Godred."

He was just about to head back when he heard it.

"…Far away from it all~" a voice sang out softly. "Never meaning to hurry-"

"What was that?" The fireman asked.

"Who cares?" James replied. "Let's get out of here!"

And without another word, James hurried back to the main line.

"Fancy not finishing your mail run until daylight," Thomas teased the next morning.

"I suppose delivering the mail is harder than Percy makes it look," Gordon grunted.

"It wasn't my fault," James puffed. "I was forced to go slow because of the stupid mist!"

Henry was unimpressed. "Doesn't stop Percy."

"And besides," James continued, "I went down the wrong line on the way to Peel Godred. That only held me up more."

Edward suddenly looked intrigued. "The wrong line? Was there a long viaduct by any chance? With a little platform on the other side?"

"I don't know about any station, but I did see the viaduct. I wouldn't cross it for all the polish on the island."

"Edward?" Thomas asked. "What's so special about that line?"

"A friend of mine used to live there. She was privately owned, but she was lent out to the railway when the workload was too heavy. Although, she stopped visiting one day. I always wondered what happened to her."

The other engines remained silent. They knew what most likely happened to the engine.

"That might be who I heard on the bridge," James said quietly.

"What?" The others asked.

"When I stopped at the viaduct, my crew and I heard somebody singing. Maybe it was that engine's ghost."

"Rubbish," snorted Gordon. "It was just your mind and the mist playing tricks on you, little James. That old line is about as haunted as…as…"

"The big station?" Henry suggested.

"Thank you. It's about as haunted as the big station!"

"Then why don't you go prove it?" James puffed angrily.

Gordon suddenly lost his bluster. "Well…I'm too big to travel down dilapidated branchlines. It would never do if the bridge were to collapse with me on it."

Thomas rolled his eyes. "I'll go investigate. I don't think there's a ghost, but I trust James when he says he heard something."

"No you don't," Emily chuckled. "You just want an excuse to have an adventure."

"That too. James, can you show me where the tracks to the old line are tonight?"

"Sure. Better your bunker than mine."

"Be careful up there," Edward warned. "Nobody has been down that line in decades. There's no telling what state the rails beyond the viaduct are in."

That night, the mist was thicker than ever. Thomas was glad he had the mail train's tail lamp to follow.

"Here we are," James said as he pulled to a stop. "Just head down this way and you'll find the viaduct."

"Thank you, James. I'll be here when you finish with the mail."

Thomas' driver switched the points, and James watched as Thomas disappeared into the darkness.

"Good luck," James muttered quietly.

Thomas puffed slowly down the line. He listened for the sound of singing, but all he could hear were the rails creaking beneath him and his own steady puffing.

Presently, Thomas arrived at the viaduct. It seemed even creepier than James made it out to be.

"Are you sure about this, Thomas?" The driver asked. "We can always come back when it's light out."

Thomas was just about to agree, when…

"I know how the moon must feel~" A voice sang softly.

"There it is! There's no time to lose!" Thomas replied resolutely.

Slowly, the little blue engine rolled onto the viaduct. It groaned under his weight, but the bridge held firm as he chuffed across it.

On the other side was a small yard with a platform. A small coach sat alone in a siding, its wood rotting and frames rusted. In front of it were a set of points leading to a small shed. From inside, Thomas could hear the mysterious singing. Thomas rolled forward and watched as his crew pushed them open.

"Oh!" A voice cried. "Where did you come from?"

Thomas looked inside to see a rusted tank engine. She was smaller than Percy, but not quite as small as Bill and Ben. She had two lamps on her running board and a small pair of water tanks.

"Who are you?" She asked suspiciously. "You're not scrap merchants, are you? Bernett warned me about scrap merchants."

"No!" Thomas laughed. "My name is Thomas, and I'm here to rescue you! Well, or put your spirit to rest. You're not a ghost, are you?"

The old engine laughed too. "No, I'm not. My name is Lady. Whatever made you think there was a ghost here?"

Thomas told her about James' encounter and Edward's story.

"I'm glad he remembered me," she sighed. "And I'm sorry about your friend. I never meant to spook him. I only sing to help me pass the time."

"Well, you'll be singing a different tune soon, because once I get a crane and a flatbed, you're getting out of here!"

Quickly, Thomas began to back up.

"Wait!" Lady cried. "The points, they tend to-"

Thomas' wheels hit the points, and with a loud ker-klunk, he slid off the tracks.

"They tend to switch back," Lady finished. "Burnett always meant to fix them. What do we do now?"

"Hmm…" Thomas thought for a moment. Then… "James!"

"James? The one I frightened? What will he do?"

"I told James I'd be back at the junction by the time he finished with the mail. Once he sees that I'm not there, he'll come looking for me! Then, we can get you to the Steamworks!"

"While we wait for him, why don't you fill me in on everything I've missed over the years?"

Thomas grinned. "Well, a few years ago, there was a great railway show on the mainland…"

James stood cold and alone at the junction.

"Where on earth is Thomas?" He groaned. "He said he'd be back by now, didn't he?"

"He's probably at the sheds waiting to scare you," chuckled the driver. "Knowing him, he might have a whole story ready."

The fireman wasn't so sure. "Those rails are pretty worn out. Maybe he derailed. We should make sure he's okay."

James watched in horror as his crew switched the points.

"Leave him!" He cried. "If Thomas wants to mess about with ghosts all night, I say let him!"

"Now James," chastised the driver, "you know Thomas would go after you if you went missing, don't you?"

James thought back to when Thomas returned to the steelworks to rescue him.

"Fine," he muttered.

"You should have seen Ashmia's face when I told her about the Culdee Fell engines. She looked like her boiler might burst from excitement!"

Lady chuckled. "You really like this Ashmia engine, don't you?"

"Peep peep!" A distant whistle cried out. "Thomas? Where are you?"

Thomas whistled a pip pip peeeep in kind. "We're over here! Help!"

James sighed when he saw the situation Thomas was in. "Why we let you go anywhere, I'll never know. Did you find the ghost?"

"Sort of," Thomas chuckled. "James, meet Lady!"

"Hello," the older engine said politely. "Thomas said you could get us out of here."

"You'll have to wait until morning," James' driver said. "It wouldn't be safe to bring a crane with all this mist."

The next morning, the Fat Controller arrived on board Butch.

"First Hiro, then Glynn, and now Lady. Whoever will you find next, Thomas?"

He inspected Lady as Thomas was pulled back onto the rails.

"Hmm, you might be just what we need to help out on Edward's branchline. Would you like that?"

Lady beamed. "Yes please, sir! It will be wonderful to see Edward again!"

Now, Lady trundles up and down Edward's branchline with gleaming red-violet paint, and can often be heard singing to her passengers and trucks. James isn't a fan, but Thomas thinks it's the loveliest sound on the island.