Simon Steinberg and Blaire Scott are one of the most respected couples in Hollywood.
They have defied the Hollywood cliché: together for decades, with three children who are successful and happy.
But when their daughter, Allegra, surprises them by getting engaged suddenly they're set to have a wedding in their Bel Air home.
As preparations begin, the chaos of last-minute arrangements, surprise announcements and ever-increasing anxiety brings out both the best and the worst in the A-list family. As plans unfold, the whole family is forced to re-evaluate their own relationships and question what's really important.
The wedding offers an opportunity for reconciliation, forgiveness and symbolises the hope of a new beginning.