When Cha Yoonwoo intentionally gets arrested in order to smuggle drugs into prison, the last thing he expects to find out during intake is that he's pregnant. With no other option, he requests a meeting with Nam Soohyeon, the manipulative prosecutor who knotted him. But Yoonwoo's incarceration takes a surprising turn when none other than the man who put him up to this whole thing shows up in handcuffs. Just how will Yoonwoo make it through his sentence with such an unlikely cast of inmates, no alpha by his side, and a baby on the way?