"How much did he drink that he's turned his phone off? I'm sure he's fine, but..."

Ju Seol-ran was worried about her son, who hadn't picked up all morning.

Her son, Jang Tae-san, who'd given his little sisters a stern talking-to and gone out to meet his friends.

One day in his second year of high school, he'd suddenly become the family's pillar.

He wrote a book and paid off the debts.

Out of nowhere he invested in stocks and made a fortune.

His grades, which had been middling, shot up to first place.

He got into Hanguk University's law department like it was nothing, and then he started a business.

He even put the friend who'd looked down on Ju Seol-ran in her place.

He was her son, all right, but sometimes he felt like a stranger.

Still, there was no doubting the love for his mother in his eyes.

That was why she trusted him and followed his lead.

At some point her husband had started treating their son with respect too.

He'd already outgrown anything his parents could do for him.

But the worries never left her.

Ju Seol-ran had grown up a chaebol's daughter.

She knew perfectly well that what lurked out there was worse than envy and jealousy.

Her son never said so, but she could guess his life in Seoul wasn't easy.

She'd sensed it the moment he suddenly posted bodyguards inside and outside the house.

Even so, Ju Seol-ran didn't ask; she just accepted it.

The knot that had built up in her chest had come undone long ago.

Now she could die with no regrets.

"I need to feed him some home cooking before he goes..."

Vacation was almost over.

She'd wanted to see her busy son's face a little longer, so she'd packed hangover soup first thing in the morning and come over.

The twins were precious too, but her longing for her son was more tender still.

Tee-dee-dee-dick-tick.

She quietly entered the code and opened the door to her son's apartment.

It was a code even the twins didn't know.