Grace

and

Leo

are

having

a

dinner

party

to

which

Grace

invites

Will,

Jack

and

Karen.

And

Leo's

just

pumped

into

his

ex,

Diane,

and

invited

her

too.

Grace

assures

Will,

Jack

and

Karen,

that

there

is

no

drama

forthcoming.

None

whatsoever.

Absolutely

not.

Unless

it

turns

out

that

Diane

is

a

secret

from

someone's

past.