She Took Her Sister's Place at the Altar. The Billionaire Groom Already Knew.

Evie Sinclair stood in the bridal suite of the Plaza Hotel in New York, staring at the wedding dress hanging on the door. Twelve thousand dollars of Italian silk and lace. Made for her sister.

"Mom," she whispered. "I can't marry him. He's Chloe's fiancé."

"Chloe," said Pamela Sinclair through her teeth, "is on a plane to Ibiza with a DJ named Rafe. She left a note on her pillow. A note." She shook the piece of paper in Evie's face. "And if there is no bride at that altar in forty minutes, Alexander Stone walks away, the deal falls through, and your father goes to prison. Do you understand me?"

Evie understood.

Her father's company, Sinclair Textiles, was drowning in debt. Eighteen months ago, he had made a deal with Stone Global, the shipping empire owned by thirty-four-year-old Alexander Stone. Stone would buy Sinclair's debt and save the company. In return, the families would be joined. Chloe would marry Alexander.

Chloe had agreed because Alexander was rich. Alexander had agreed for reasons nobody understood. He was famous for being cold, private and impossible to read.

And now Chloe was gone.

"We're the same height," Pamela said, already pulling the dress off the hanger. "Same size, more or less. With the cathedral veil, nobody will see your face until the vows. By then it'll be too late for him to walk away in front of five hundred people."

"That's fraud, Mom."

Gordon Sinclair, her father, was sitting on the edge of the hotel bed with his head in his hands.

"Evie," he said. "Please. I'm begging you."

Evie was twenty-six. She was the plain one. The quiet one. The one who'd always been told to stand at the back of the family photos. While Chloe went to parties and modeled for magazines, Evie had worked as a nurse in the pediatric cancer ward at Mount Sinai and lived in a studio apartment in Queens.

She'd spent her whole life being the daughter nobody looked at.

And now they needed her.

"Alright," she whispered.

Her mother didn't say thank you. She just zipped up the dress so tightly Evie couldn't breathe.

Ten minutes before the ceremony, the door opened, and Evie's grandmother came in.

Nana June was eighty-one and walked with a cane. She was the only one in the family who had ever treated Evie like she mattered.

She took one look at Evie in the white dress and Pamela fastening the veil, and her face hardened.

"Pamela," she said. "What have you done?"

"What had to be done."

Nana June took Evie's face in her wrinkled hands.

"You don't have to do this, sweetheart. You can walk out that door. I'll go with you."

Evie looked at her father, still sitting on the bed, gray and terrified.

"I do have to, Nana," she said softly. "If I don't, Daddy goes to prison."

Nana June's eyes filled with tears.

She reached into her purse and pressed something into Evie's gloved hand. A small, folded piece of paper.

"Your sister wrote this," she said quietly. "It wasn't the note on her pillow. It was in the trash can in her room. I think you need to read it before you walk down that aisle."

The organ began to play.

Pamela grabbed Evie's arm and pushed her toward the door.

There was no time.

Evie stuffed the paper into her bouquet.

The aisle of St. Patrick's Cathedral was the longest walk of her life.

Five hundred guests. Flashbulbs. Her father's arm shaking under her hand. Through the thick white veil, everything was blurred and far away.

At the end of the aisle stood Alexander Stone.

He was tall, dark-haired and very still, in a black tuxedo. He was famous for never smiling. He didn't smile now.

Her father placed her hand in his and stepped back.

The priest began the vows. Evie barely heard them. Her heart was pounding so hard it hurt.

"You may lift the veil."

Alexander reached up with both hands and slowly lifted the lace away from her face.

Five hundred people gasped.

Evie stared up at him, terrified, waiting for him to shout, to walk away, to call the police.

Alexander Stone looked down at her face for a long, long moment.

And then, for the first time anyone in that cathedral had ever seen, he smiled.

"Hello, Evie," he said softly. "I was hoping it would be you."