At 20 years old, Lin Zhou's romantic endeavors faced repeated setbacks, until a mysterious "Heartbeat APP" suddenly appeared in his phone, allowing him to see the true affection of the people around him. Facing childhood sweethearts who grew up with him, Lin Zhou rediscovers each other through repeated interactions and misunderstandings. Youth, friendship, growth, and dreams intertwine, and once-distant partners gradually reclaim precious bonds. Lin Zhou also understands that true affection is never data and rewards, but respect, trust, companionship, and growing into better versions of themselves together.