"I
want
to
be
reborn
as a
tree,
because
a
tree
can
put
its
roots
down
next
to
their
one
true
love,
so
that
I
never
have
to
be
separated
from
anyone
again."
~
Yoon
Eun-seo
Jun-seo
(Song
Seung-heon)
and
Eun-seo
(Song
Hye-kyo)
were
happily
growing
up
as
brother
and
sister
until
the
results
of a
blood
test
turned
their
lives
upside-down.
The
blood
test,
brought
on
by
injury
in a
car
accident,
revealed
that
Eun-seo
had
been
switched
at
birth
with
another
girl.
When
this
was
brought
out
into
the
open,
she
was
placed
with
her
birth
family
and
Jun-seo's
family
went
to
the
United
States.
Years
later,
in
his
early
twenties,
Jun-seo
returned
to
his
hometown
in
Korea
where
he
one
day
ran
into
Eun-seo
unexpectedly.
Eun-seo
was
being
courted
by
the
son
of a
wealthy
family,
Tae-seok
(Won
Bin),
when
she
met
Jun-seo
again.
She
didn't
realize
how
much
she
had
missed
him
since
that
chance
meeting.
They
were
both
working
in
the
art
field
and
began
to
spend
time
together.
The
two
that
had
once
grown
up
believing
that
they
were
brother
and
sister,
had
begun
to
develop
romantic
feelings.
They
were
emotionally
distraught
and
unsure
of
what
to
do
with
these
feelings
of
romantic
love.
Eventually,
they
decided
that
they
had
no
choice
but
to
consider
themselves
brother
and
sister.
They
had
decided
to
go
on
one
last
trip
together
when
they
realized
that
their
feelings
of
love
couldn't
be
denied,
turning
there
trip
into
an
escape
from
their
family
and
former
loves.
Loved
ones
looked
upon
them
with
disdain;
they
were
unable
to
understand
their
newfound
love.
Unable
to
live
with
the
guilt,
they
once
again
decided
to
separate.
Eun-seo
returns
to
Tae-seok,
and
decides
not
tell
Jun-seo
that
she
is
suffering
from
cancer.
As
her
condition
worsens,
Jun-seo
learns
all
about
the
secret
that
Eun-seo
has
been
keeping
from
him
and
runs
to
her
bedside.
They
spend
Eun-seo's
remaining
time
at
Jun-seo's
art
studio.
They
return
to
the
beach
they
visited
in
childhood;
here
Jun-seo
carries
Eun-seo
on
his
back
while
she
takes
her
last
breath.
Before
Eun-seo
died,
she
told
Jun-seo
not
to
follow
her
in
death,
and
to
continue
living.
However,
Jun-seo,
grief-stricken
by
the
death
of
his
lover
and
"sister",
allowed
himself
to
be
struck
by a
truck
(ironically
the
story
starts
with
Eun-seo
being
struck
by a
truck).
Song Seung-heon as
Yoon Jun-seo
Jun-seo
is thrown into utter confusion after learning
that his younger sister was mistakenly switched
with another baby when she was just born. His
heart-wrenching love toward the woman he always
thought to be his blood sister one day evolves
into agony over the love that may never be
consummated.
Song Hye-gyo as
Yoon (Choi) Eun-seo
Eun-seo's destiny was
mistakenly changed right after her birth. After
living for 14 years with the people she regarded
her birth parents and blood brother, she finds
herself in a completely different environment,
all by herself, with a good-for-nothing brother
and a step-mother, who swears all the time. But
this sad character finds a way to survive thanks
to her uniquely outgoing personality and strong
will.
Won Bin as Han Tae-seok
Han
Tae-seok is a troublesome rich and handsome hunk
from a wealthy family. Tae-seok always made fun
of Eun-seo, and actually falling in love for her
instead. Eun-seo was fired because of Tae-seok,
but both of them became friends rather than
enemies.
