In 2024, Allison Carter visits Ellis Estate to investigate her great-grandfather Frank’s disappearance. Her phone travels to 1937, found by Henry Ellis. Cross-time talk begins: she needs help finding Frank; he’s intrigued by the phone. An air-raid warning becomes the turning point. With history, she warns Henry, who risks his life stopping his father. Henry finds Frank, sees him save Jack, and learns sacrifice on a medicine trip. Frank entrusts Henry with a last letter, buried under flowers; years later, Allison unearths it, clearing her family’s name. As the phone dies, Henry abandons escape, sells everything to help orphans, giving Jack his ticket. With 1% battery, he lies about boarding: “See you at Ellis Estate in 2025.” Later, Allison finds his name in a memorial, unearths the phone, sees his selfies, and realizes his silent sacrifice. Donating them, she meets his double. Flowers sway, as if their vow is fulfilled.
