Episode 4 of "Heavenly Ever After" unfolds with an emotional photoshoot featuring an elderly couple, their portrait ultimately serving as a poignant tribute at their funeral. Meanwhile, Young-ae is haunted by vivid dreams of Hell's minions coming for her, leaving her deeply unnerved and unsettled.
Later, Hye-suk experiences a softening of heart towards Som-i, yet confronts Nak-jun, accusing him of indulging in extracurricular affairs. Nak-jun fiercely denies these allegations, desperately attempting to assure her of his innocence and claiming that he doesn't even know Som-i personally. The episode also delves into Nak-jun's past, revealing an anecdote where he was almost cast as an actor by a tipsy director, only for the director to sober up the next day and rescind the offer, realizing it had been a whimsical mistake.
The following morning, the elderly couple witnesses Som-i frolicking with Sonya, chasing butterflies with carefree abandon. They are amused by how naturally and comfortably Sonya interacts with her. Elsewhere, a rebellion brews among abused dogs, who galvanize other mistreated pets to establish a unique hell专门 designed for humans who harm animals. The President, noticing their concerted efforts, invites three dogs—Jjajang, Jjamppong, and Mandu—to elucidate that in their realm, punishment is meticulously administered, and those who mistreat living beings must atone for their transgressions.
Elsewhere, Hye-suk visits the church once more, but her sleepiness leads her to doze off during the pastor's sermon, much to his irritation. Later, she prepares two bowls of ramen, marking the end of her reformative class for the day. On her way home, she serendipitously encounters Som-i, who shields her from a wayward badminton shuttlecock, just as Young-ae used to do. That night, Young-ae, terrorized by yet another nightmare involving Hell's workers, climbs into bed with Hye-suk, mirroring Young-ae's comforting presence from the past.
The following day, Som-i accompanied Hye-suk to the church, where, much to the proud pastor's delight, they encountered a fresh face during the service. Elsewhere, the President demonstrated to the trio of dogs how deceased pets, manifesting as hallucinations or dreams, aid their owners in grieving and moving forward. Observing this, Jjamppong began to ponder if perhaps humanity wasn't entirely devoid of virtue, especially if pets genuinely harbored wishes for their human companions' happiness.
Later, as the dogs came across Som-i awaiting them outside the church, they mentioned their desire to visit hell before proceeding to the service center. Inside the center, Hell's workers were in pursuit of an escaped spirit. The staff revealed that runaway spirits emitted a distinctive odor, making them detectable to pets, despite their ability to blend seamlessly among Heaven's inhabitants. It dawned on the dogs that Som-i was, in fact, the runaway they had scented earlier but mistakenly identified as another pet.
In the meantime, Hye-suk took Som-i to the service center to inquire about Young-ae. To her astonishment, she learned that Young-ae had passed away and was assigned to Hell. Overwhelmed with joy, Hye-suk deduced that Som-i must indeed be Young-ae and eagerly imparted this news to Nak-jun.
Yet, Nak-jun remained cautious about the entire situation, even as Hye-suk exhorted Som-i to embrace her identity as Young-ae. Savoring the warmth and sense of belonging, Som-i increasingly convinced herself of her identity as Young-ae.
Meanwhile, Jjajang resolved to infiltrate the family to ensnare Som-i. However, upon realizing Hye-suk's allergy to dog fur—a realization that earned him another grape as punishment for his cursing—he decided to shed his fur.
Later, within the serene confines of the church, Hye-suk's path crosses with the elderly man once more. Her eyes catch a glimpse of a sack of soybeans lying nearby, inspiring her to propose a heartfelt deviation from the religious service—crafting soy milk together. The pastor, too, joins their unexpected gathering, and the trio finds solace in sharing their poignant life narratives. The pastor reveals his abandoned childhood, while the old man unfolds his poignant tale of living in a truck with his ailing spouse, selling trinkets to make ends meet, until his cancer diagnosis shattered their world. Fearing his impending demise would leave her desolate, he took a fateful plunge with their truck off a cliff, embracing death as an escape for both of them. Just as this somber confession unfolds, the President and his minions from Hell arrive on the scene, revealing the old man's true identity as an escaped spirit.
In a fit of desperation, the old man seizes Hye-suk, demanding answers about his wife's eternal fate—Heaven or Hell. However, the President, judging him as a sinner, refuses to grant him peace. Meanwhile, Nak-jun, in his role as a postman, receives a heartfelt muffler knitted by the old man's deceased wife. Upon hearing the disturbance at the church, he hastily makes his way there, offering the muffler to the old man as a silent assurance that his beloved had indeed reached the heavens. Nak-jun's gesture of compassion disarms the old man, who releases Hye-suk and submits himself peacefully, burdened by the guilt of leading his wife to her death without her consent.
Returning home, Nak-jun and Hye-suk find Som-i cowering in fear inside a closet, her tiny figure trembling. Hye-suk calls out to her with the endearing name "Young-ae," while in the depths of Hell, a fleeting vision of the real Young-ae is seen walking steadfastly towards her destiny.
