Suspecting infidelity, friends Ah Hui (Adam Chen) and Zihua (Alaric Tay) concoct a bizarre scheme. They exchange anonymous love letters to test their neglected wives, Michelle (Yeo Yann Yann) and Xiao Tong (Magdalene See). Their deceptive ploy spectacularly backfires when the lonely women actually respond, culminating in a shocking hotel proposition that threatens both marriages.