The tenth episode of To The Moon commences with a shocking revelation for our protagonists as a cyberhacking incident plunges the value of Enderium. Over lunch with Ji-woo, Eun-sang inquires about the rumor that he's quitting his job, but he dismisses it as mere gossip. At work, Manager Ko tasks Da-hee with collaborating on Da-hae's snack subscription project. During their chat, Da-hae confesses to taking the letter from Da-hee's locker, promising to explain it later. Da-hee's mention of accidentally throwing the letter in the trash seems peculiar to Da-hae. When Da-hae visits her parents, she learns that her mother might have to retire early due to changes at work.
At the office, Da-hae decides to take her severance pay early to invest in crypto. During the marketing team's meeting, Da-hee points out several issues with Da-hae's project, and Manager Ko advises her to consult with her friends. So, Da-hae organizes a late-night brainstorming session with her besties, hoping to keep an eye on the crypto market. However, Eun-sang excuses herself, leaving the other two to fend for themselves.
In the morning, Ji-song overhears Eun-sang discussing renting out her apartment with a realtor. At work, everyone buzzes about Hoppang Bite's new post boasting a co-worker who made a million dollars through cryptocurrency. While the post doesn't name anyone specifically, it clearly hints at Eun-sang. The conversation sparks a subtle taunt from Da-hee to Da-hae, wondering if Eun-sang was the sole one among them to make such a windfall. Meanwhile, a rock festival in the UK takes a liking to Ji-woo's song and invites him to play!
That evening, Eun-sang convinces the other two girls to take a cab, igniting their imagination. The trio later dines at a fancy restaurant they had booked in advance. When Eun-sang offers to pay for lobster, Da-hae finally breaks and reveals the rumors about Eun-sang making money from crypto and buying a house without telling them. Eun-sang gets exasperated that the other two actually believe it, and things escalate into a heated argument.
Eun-sang then reveals that she took her severance pay early to pay back her friends, as she had encouraged them to invest in crypto and was scared of making their lives even tougher. The two girls are moved and tell Eun-sang that all they want is for her to be happy, leading to a tearful reunion.
At the office, Ji-woo learns with a heavy heart that he's unable to attend the rock festival due to crucial meetings with the CEO and chairman. The thought of disappointing his friends weighs heavily on him, but when Da-hae rants about her financial woes, he decides against burdening her with his own troubles.
Meanwhile, Ji-song persistently messages her father, a monk, eager to learn about her fortune. When he doesn't respond, she enlists Da-hae and Eun-sang to accompany her on a visit. At the monastery, they are required to leave their phones behind. After hours of prayer, Ji-song reveals her deceit—she never turned her phone in. Desperate for a signal to check the cryptocurrency's status, they create a commotion, inadvertently waking the monks.
Ji-song's father counsels them with wisdom, reminding them to focus on how they'll use their money once they receive it. On their way back, they fall asleep on the bus, their dreams intertwined with the train to the moon. After a momentary stasis, the train kicks off again, floating through space and surrounded by a celestial display of fireworks. In the real world, Enderium soars again. Elsewhere, Ji-woo takes out his frustration on an unlucky mosquito.
Back at work, Da-hae counters Da-hee's criticisms of her subscription service with a creative tiered plan that can be shared with friends and families. Da-hee's displeasure is palpable, and we see her vent her anger online—she's Hoppang Bite! Later, Da-hae asks Da-hee not to spread rumors about Eun-sang and even admits her own relationship with Ji-woo. She confesses a nagging feeling that she's acting deliberately and warns Da-hee that she's not easily rattled.
Da-hae then meets with Ji-woo, who uses a metaphorical mosquito swat to reveal his intention to quit his job and pursue singing. He promises to ensure he can still provide for her and keep her happy. At the same time, Eun-sang and Ji-song arrive with the good news that the crypto has finally risen!
