After long years on the run, Grania fell pregnant with Diarmait's child, but fate was about to catch up with them. One day out in the wilderness, with Fionn and his men closing in, Diarmait and Grania came across the heath of Benbulben in Co. Sligo, where a giant boar confronted them. This was bad news for Diarmait, whom legend had told that the only living creature that could harm him, was a wild boar. As the boar charged, Diarmait, protecting his heavily pregnant lover, wrestled it to the ground in a fight to the death. The warrior killed the boar with his sword, but not before the boar had gored Diarmait, fatally wounding him.
As Fionn and his men came upon their long-sought quarry, he found Diarmait dying in a heavily pregnant Grania's arms. A despairing Grania knew she had just one chance to save her lover. She implored Fionn to show mercy and save his former friend by curing Diarmait with a drink of water cupped by his magical hands. But Fionn refused, still hurt that his best friend had eloped with his betrothed. With Diarmait dying, Fionn's men begged him to help this once great warrior to live. But still Fionn refused. It was only when Fionn's son Oisin challenged his father and threatened to kill him that Fionn agreed to help Diarmait. But it was too late, Diarmait had died before Fionn could save him. He looked at his dead friend with the life-saving water falling between his fingers. The question remains, what would you do with one last drop?