Concept of Barzakh?

From early times, I knew or learned that after death, one would remain in grave (punishment in grave for sins or otherwise) until he/she is resurrected on the **Day of Reckoning**. However, recently I came to know about concept of **Barzakh** (as seen here ) which they say is temporary place after death and one would remain there before the Judgement Day. Question: I have confusion where will we be after death ? **Grave or Barzakh** according to Quran/Hadith ? Thanks in advance.