Guru Amardass follows Guru Angad as the next Guru. However Guru Angad's son, Dattu, does not like having a former servant as his Guru. Dattu decides to become the Guru and so he kicks Guru Amardass out as Guru and installs himself.
Guru Angad woke up in the early morning. He was thirsty, and he asked his sons to bring him water, but they said that it's raining outside and we would have to go to the lake to get water. Bhai Amar Das saw this happen, and he felt the need to serve his Guru. He went outside during the great storm to bring the Guru some water.
There was a great drought, no water to drink or to grow food. Animals were died and the farmers became scared and desperate. A Brahman monk told the farmers, "The reason why there is a drought is because you are giving respect to a man who is not a Brahman. Everyone is treating this 'Guru Angad' like a holy man. Kick him out and I will bring the rain. The farmers listened to the monks false promise. What will Bhai Amar Das do when he hears the Guru was kicked out for this nonsense.
Amar Das ji rode to meet the True Guru. The Guru and Amar Das ji were related and Amar Das ji was a couple decades older. When Amar Das ji saw his saintly face, instead of hugging the Guru, Amar Das ji fell on his knees and said, "Please don't consider me your relative and don't even consider me your elder. Just take me as a student and show me the right path!" Amar Das ji devoted himself to the Guru's service for the rest of his life.
Once Guru Nanak went on a long walk with all his dicsiples. As they were walking some people found money on the ground and they went home. After a long, long distance only two Sikhs were left. Guru Nanak told them to eat a dead body. One Sikh couldn't do it, but Bhai Lehna humbly obeyed. Lehna's devotion surpassed all tests. He was so devoted he was like an 'ang' a limb of the Guru.
Humayun went to Guru Angad to get blessing and restore his rule. He got angry that the Guru didn't give him respect so he went to kill the Guru. Then Guru Angad told him that he is quick to kill men of God, but couldn't defend his on kingdom. Humayun bowed to the Guru and asked forgiveness.