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Where to watch "When the Phone Rings"
4. Episode 4
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After receiving the ominous call, Hee-joo abandons her clandestine plan. She then undergoes a tough interview with Sa-eon — sharing an intimate moment.
3. Episode 3
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After Sa-eon experiences an attack, he grows wary of Hee-joo's relationship with her friend. Meanwhile, an ominous figure makes his presence known.
2. Episode 2
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Sa-eon works quickly to track down the caller, forcing Hee-joo to stay hypervigilant. Despite her fears, she continues to play along with the ruse.
1. Episode 1
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After receiving a call from Hong Hee-joo's kidnapper, Paik Sa-eon attempts to learn more about him — only to find it's hard to escape his surveillance.