At her wedding, Ellie discovers that her fiancé Mike has dumped her and chose a trust-fund girl Ada to be his bride. Ellie impulsively grabs a passing janitor Daniel and marries him instead, inviting him to join her on the prepaid 7-day luxury honeymoon on Rainbow Island. What she doesn't know is that the "janitor" is actually a billionaire disguised as a cleaner to escape an arranged marriage by his mother, and the owner of the entire Rainbow Island. The two strike a deal: a "flash marriage" that will end with a divorce after the honeymoon. But as the countdown to their separation ticks away, they unexpectedly fall in love.
