Tim was at Titans Tower when Wonder Woman asked for his help

Tim was assigned house sitting duty while the Titans were away. Nightwing was back in Gotham helping Bruce put a lid on the recent crime wave which hit the city hard. Starfire, Cassie, and Donna were off world dealing with Blackfire and her forces. Cyborg and Beast Boy were on the JLA Watchtower, supervising training and conducting technical repairs. Raven was out meditating or whatever it was she did in her free time. All the others had their own similar personal obligations or battles to fight, leaving Tim all alone to pout on the couch and watch over the Titans Tower in his Red Robin costume.

"I can't believe I'm on the sidelines again."

Tim grumbled.

Ever since he became Red Robin, he felt like his friends had forgotten he existed. Bat Family included. Bruce and everyone else were preoccupied with training up Damian, his replacement. He stood by, waiting for the chance to prove to himself and to his friends that he was worth his own salt as his own hero. Not just Batman's sidekick. But that was something even Dick and Jason had to overcome when they ditched the mantle, too. Out of all people, he thought they'd understand.

Yet there he was. Again. By himself, doing nothing, while his friends were out being superheroes. Saving the world.

CRASH!

The window shattered. Tim leapt to his feet, forming a defensive stance with the TV remote. He eased up when his eyes landed on the star spangled armor.

"Tim, where is Donna and Cassie?"

None other than Wonder Woman flew in with a concerned expression. Her arms folded over the golden WW on her chest.

"Wonder Woman!" Tim paused. "You know we have a door, right..?"

"Tim, this is urgent. Where are they?"

She had no time for jokes.

"With Starfire back on Tamaran," he replied. "Uh... what's this about?"

Diana scrunched her brows. Not the answer she wanted to hear.

"You'll have to do, then. Come on."

Wonder Woman waved for Tim to follow her. Puzzled, yet intrigued by the princess' cryptic words, he caught up to her. He was eager to prove himself as his own hero and what better chance to do so than helping out a founding member of the Justice League.

Diana boarded her signature invisible jet, Tim being the nerd he was couldn't help but whistle approvingly once he saw the inside.

"Geez, Wonder Woman, this thing makes the Batwing look like an antique!"

"This way."

She led him into a side room which contained a small bed, a closet, and a vanity. What he assumed were Diana's personal quarters on the vessel.

"What are we doing in here?"

Diana ignored his question, opening the closet and sifting through the racks of various colorful costumes before finally landing on one in particular. She plucked the outfit off the rack and handed it to him.

"Here, put this on. We're going to Themyscira and you need to blend in."