Dong Joo comes back as a doctor after years abroad. Soo Wan has moved on and become a stronger, different person.

Seeing how happy Soo Wan is, Dong Joo keeps his identity a secret. Soo Wan struggles to figure out why the new doctor is so familiar.

Ji Woon wants to bring Soo Wan and Dong Joo together as friends. Meanwhile the two disguise their feelings for each other with hostility.