Alan and Aria blamed themselves for not being quick to check on the security footage.
That day, they didn't know Arna was missing until Nathan became wary of Naira's behavior in the mall while looking for Arna.
By the time they got the footage of Arna leaving the hotel, hailing a taxi, and then leaving the country, it was too late.
Aria and Alan had no time to worry about Naira or ask her what happened, so they had sent Nathan to leave her safe in the Woods mansion.
Their bad luck, Aria and Alan didn't get the immediate airtime or immediate flight to follow Arna.
They were late by more than twenty hours and Arna was scared to her wits upon realizing what she had put herself into.
Since Alan had called Vince Fang beforehand, he had picked Arna from the airport and be with Arna. Vince had seen Arna's emotional state was at its worst and terribly unstable.