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Faith Carter is a very shy and quiet girl. One day, she finds a notebook under a radiator. Curious, she reads it and finds out that it's a diary of a teenage boy known as C. She is asked, by the guy, to reply back and leave the notebook at the same spot under the radiator. She does so and they communicate through that way. She wants to know who he is and has found a jock, a bad boy, and a player as prime suspects. All three boys have also found an interest in the quiet girl as she tries to figure out who is C.