Julie is a high school senior and aspiring writer living in a small town. Devastated by the sudden loss of her boyfriend in a car accident, she completely isolates herself and refuses to attend his memorial services. She discovers an unexplained phenomenon when she dials his old cell phone number and he answers her call from beyond.

Sam is Julie's deceased boyfriend and a talented musician. He dies in a car collision while driving to pick Julie up from the airport. Despite passing away, he miraculously answers his cell phone when Julie calls, speaking to her from an unknown location and trying to help her cope with his absence.

Mika is Sam's cousin and used to be close friends with Julie. She processes her grief openly by attending vigils and creating an altar in her home. She deeply resents Julie for skipping Sam's funeral and withdrawing from their social circle.

Oliver is Sam's quirky, outgoing best friend. Though he and Julie never clicked while Sam was alive, he reaches out to her at school to share his sadness. He frequently visits Sam's grave and hopes to form a support system with Julie.

Julie's mother is a college philosophy professor raising her daughter alone following a divorce. She tries to offer emotional support and a listening ear, though Julie frequently pushes her away to process her feelings in private.

Yuki is an exchange student who lived with Sam's family during her first year in the program. She warmly welcomes Julie back to the cafeteria and shares her own experiences with loss to offer comfort.

Rachel is an Asian exchange student at Julie's high school. She petitions to start an Asian Student Club and tries to offer Julie a sense of normalcy and community during lunch periods.

Jay is part of the close-knit group of exchange students who eat lunch with Julie. He provides a friendly presence and helps the group maintain a supportive environment during a difficult time.

Taylor is one of Sam's friends from high school. She aggressively projects her anger over Sam's death onto Julie, outright blaming her for the car accident since Sam was driving to pick Julie up when he died.

Liam is another friend of Sam's who resents Julie. He openly criticizes Julie for skipping Sam's funeral, using his own attendance as proof that he respects their late friend more than she does.

Tristan is Julie's coworker at the local bookstore. He makes short films and shyly invites Julie to a local spring film festival, acting as a gentle presence in her work environment.

Mr. Lee owns the local bookstore where Julie and Tristan work. He acts as an encouraging mentor to Julie, gifting her a beautiful journal and advising her to focus on writing stories that mean something to her.

James is Sam's much younger brother. He looks up to Sam immensely and struggles to understand the sudden loss of his older sibling, acting out as he tries to process the absence.

Mr. Gill is Julie's strict English teacher. He refuses to grant Julie an extension on her assignment despite her recent loss, insisting that life does not make exceptions during hard times.