A group of three friends stumble upon a mysterious medical capsules that has the power to erase a single day's worth of memories. Curiosity gets the better of them, and they decide to experiment with this newfound technology. As they use the capsule, erasing their own memories of specific days, they soon realize the immense consequences that come with tampering with the past. Desperate to reverse the damage they've unwittingly caused, the friends try to unravel the secrets behind its creation.